Daikin ERAP110MBYNN User manual

OPERATION MANUAL
ERAP110MBYNN
ERAP150MBYNN
ERAP170MBYNN
Air-cooled condensing units

Operation manual
1ERAP110~170MBYNN
Air-cooled condensing units
4PW22681-1
CONTENTS Page
Introduction ....................................................................................... 1
Technical specifications ............................................................................. 1
Electrical specifications ............................................................................. 1
Description ........................................................................................ 2
Function of the main components.............................................................. 3
Safety devices............................................................................................ 3
Internal wiring - Parts table........................................................................ 4
Before operation................................................................................ 4
Checks before initial start-up ..................................................................... 4
Power supply connection and crankcase heating...................................... 5
General recommendations ........................................................................ 5
Operation .......................................................................................... 5
Digital controller......................................................................................... 5
Working with the unit ................................................................................. 6
Advanced features of the digital controller................................................. 8
Troubleshooting............................................................................... 13
Maintenance.................................................................................... 14
Maintenance activities ............................................................................. 14
Disposal requirements............................................................................. 14
INTRODUCTION
This operation manual concerns air-cooled condensing units of the
Daikin ERAP-MBYNN series. These units are provided for outdoor
installation and used for cooling applications.
This manual has been prepared to ensure adequate operation and
maintenance of the unit. It will tell you how to use the unit properly
and will provide help if problems occur. The unit is equipped with
safety devices, but they will not necessarily prevent all problems
caused by improper operation or inadequate maintenance.
In case of persisting problems contact your local Daikin Dealer.
Technical specifications(1)
Electrical specifications(1)
ERAP110MBYNN
ERAP150MBYNN
ERAP170MBYNN Air-cooled condensing units Operation manual
READ THIS MANUAL ATTENTIVELY BEFORE STARTING
UP THE UNIT. DO NOT THROW IT AWAY. KEEP IT IN
YOUR FILES FOR FUTURE REFERENCE.
Before starting up the unit for the first time, make sure that
it has been properly installed. It is therefore necessary to
carefully read the installation manual supplied with the unit
and the recommendations listed in "Checks before initial
start-up" on page 4.
(1) Refer to the engineering data book for the complete list of specifications.
General ERAP 110 150 170
Dimensions HxWxD (mm) 2160x2340x2238
Machine weight (kg) 1326 1440 1516
Connections
• liquid line (inch) 7/8" OD
• suction line (inch) 2 1/8" OD
• pressure relief valve outlet (inch) FNPT 1"
Compressor
Type semi-hermetic single screw
Qtyxmodel
1x
ZHC3LTGUYE 1x ZHC3WLGUYE 1x ZHC5LMGUYE
Speed (rpm) 2880
Oil type FVC 68D
Oil charge volume (l) 5.5 5.5 7.5
Condensor
Nominal air flow (m3/min) 4x 240 4x 240 4x 240
No. of motorsxoutput (kW) 4x 0.55 4x 1.02 4x 1.02
Model ERAP 110 150 170
Power supply
• Phase 3~
•Frequency (Hz) 50
•Voltage (V) 400
•Voltage tolerance (%) ±10
Unit
• Nominal running current (A) 70 84 104
• Maximum running current (A) 95 120 135
• Recommended fuses
according to IEC 269-2 (A)(gL) 3x 125 3x 160 3x 160
Compressor
• Phase 3~
•Frequency (Hz) 50
•Voltage (V) 400
• Nominal running current (A) 62 70 90
Control and fan motor
• Phase 3~
•Frequency (Hz) 50
•Voltage (V) 400
• Nominal running current (A) 7.6 12.4 12.4

ERAP110~170MBYNN
Air-cooled condensing units
4PW22681-1
Operation manual
2
DESCRIPTION
The ERAP air-cooled condensing units are available in 3 standard sizes.
Figure - Main components
Required space around the unit for service and air intake
1000
1000
1000
1000 1000
3000
2210
2346
13
10 11
7
6
16
2 3 9 5 14
15
8
12
4
1
1Condenser 9Power supply intake
2Compressor (M1C) 10 Emergency stop (S5E)
3Discharge stop valve 11 Switchbox
4Liquid stop valve 12 Digital display controller
5Suction stop valve 13 Transportbeam
6Suction line 14 Ambient temperature sensor (R5T)
7Liquid line 15 Field wiring intake
8Drier + charge valve 16 Main isolator switch (optional - S13S)

Operation manual
3ERAP110~170MBYNN
Air-cooled condensing units
4PW22681-1
Function of the main components
Figure - Functional diagram
As the refrigerant circulates through the unit, changes in its state or
condition occur. These changes are caused by the following main
components:
■Compressor
The compressor (M*C) acts as a pump and circulates the
refrigerant in the refrigeration circuit. It compresses the
refrigerant vapour coming from the evaporator at the pressure at
which it can easily be liquefied in the condenser.
■Condenser
The function of the condenser is to change the state of the
refrigerant from gaseous to liquid. The heat gained by the gas in
the evaporator is discharged through the condenser to the
ambient air, and the vapour condenses to liquid.
■Filter/drier
The filter installed behind the condenser removes small particles
from the refrigerant to prevent blockage of the tubes.
The drier takes water out of the system.
Safety devices
The unit is equipped with two kinds of safety device:
1General safety devices
General safety devices shut down all circuits and stop the whole
unit. For this reason the unit has to be manually put on again
after a general safety occurred.
2Part safety devices
Part safety devices shut down the part they protect.
An overview of all safety devices is given below.
■Overcurrent relay
The overcurrent relays (K*S) are located in the switchbox of the
unit and protect the compressor motors in case of overload,
phase failure or too low voltage. The relays are factory-set and
may not be adjusted. When activated, they must be reset
manually, followed by a reset of the controller.
■Compressor thermal protectors
The compressor motors are equipped with thermal protectors
(Q*M). The protectors are activated when the compressor motor
temperature becomes too high.
When temperature returns to normal, the protectors reset
automatically, but the controller needs to be reset manually.
■Fan motor thermal protector
The condenser fan motors are equipped with thermal protectors
(Q*F). The protectors are activated when the temperature
becomes too high. When temperature returns to normal, the
protectors reset automatically.
■Discharge thermal protectors
The unit is equipped with discharge thermal protectors (S*T).
The protectors are activated when the temperature of the
refrigerant leaving the compressor becomes too high. When the
temperature returns to normal the protector resets automatically
and the controller needs to be reset manually.
■Low pressure safety
When the suction pressure of a circuit is too low, the circuit
controller shuts down the circuit. When the pressure returns to
normal, the safety device can be reset on the controller.
■Pressure relief safety valve
The safety valve is activated when the pressure in the refrigerant
circuit becomes too high. If this occurs, shut down the unit and
contact your local dealer.
Y15S
Y16S
B1P
S3T
M1C
R5T
S14PH
S1PH
Y11S
B2P
M11F M12F M14FM13F
1 4
3
2
5
5 5
B
A
(*)
7
6
1Condenser 6Suction stop valve
2Drier 7Strainer
3Charge valve AStandard
4Liquid stop valve BDual pressure relief valve (OP03)
5Safety valve (*) Standard (see A) or dual pressure relief valve (see B)

ERAP110~170MBYNN
Air-cooled condensing units
4PW22681-1
Operation manual
4
■High pressure switch
Each circuit is protected by two high pressure switches (S*PH)
which measure the condenser pressure (pressure at the outlet
of the compressor). They are installed in the compressor
housing of the circuit. When the pressure becomes too high, the
pressure switches are activated and the circuit stops.
The switches are factory-set and may not be adjusted. When
activated, they must be reset by means of a screwdriver. The
controller still needs to be reset.
■Reverse phase protector
The reverse phase protectors (R*P) prevent the screw
compressors from running in the wrong direction. If the
compressors do not start, two phases of the power supply must
be inverted.
Internal wiring - Parts table
Refer to the internal wiring diagram supplied with the unit. The
abbreviations used are listed below:
A1 ...............** ....... Current transfo/A-meter
A1P........................ PCB-controller
B1P........................ Low pressure transmitter
B2P........................ High pressure transmitter
C1~C3 ................... Capacitor
E1HC..................... Crankcase heater compressor
E3H........................ Evaporator heater
F1U~F3U....# ........ Main fuses
F4U,F5U .....# ........ Fuses for evaporator heater
F6B........................ Fuse for primary of TR1
F7B........................ Fuse for secondary of TR1
F8U........................ Surge proof fuse for A1P
F9B........................ Fuse for secondary of TR2
F12B...................... Fuse for fanmotors
H1P.............*......... Indication lamp general operation
H2P.............*......... Indication lamp alarm
H3P.............*......... Indication lamp operation compressor
H5P.............*......... Changeable output
J1........................... Power supply
J11......................... RS485 connection
J2,J3,J6 ................. Analog input
J5,J7,J8 ................. Digital input
J12~J18................. Digital output
K1M ....................... Linecontactor
K2M ....................... Deltacontactor
K3M ....................... Starcontactor
K7F~K9F ............... Fancontactor
K17S...................... Overcurrent relay
K1A........................ Auxiliary relay for safeties
K2A........................ Auxiliary relay compressor thermal protector
K3A........................ Auxiliary relay for discharge thermal protector
K7A........................ Auxiliary relay for safety high pressure
L1,L2,L3................. Main supply terminals
M11F-M14F........... Fan motors
M1C....................... Compressor motor
M1S ....................... Stepless capacity control for compressor
PE.......................... Main earth terminal
Q11F~Q14F .......... Thermal protectors fan motors
Q1M....................... Thermal protector compressor motor
R1.......................... Auxiliary resistance for feedback
R1F ........................Feedback resistance
R1P........................Reverse phase protector
R4T ........................Sensor for thermostat
R5T ........................Sensor for ambient temperature
S1PH......................High pressure switch
S3T ........................Discharge thermal protector
S5E ........................Emergency stop push button
S6S ............ * .........Changeable switch for remote function
(e.g. remote start/stop)
S8L.........................Flowswitch
S9L............. #.........Contact that closes if the fan/pump is working
S10S .......... * .........Changeable switch for remote function
(e.g. dual setpoint)
S11S .......... * .........Changeable switch for remote function
(e.g. enable/disable capacity limitation 1)
S12S .......... * .........Changeable switch for remote function
(e.g. enable/disable capacity limitation 2)
S13S .......... ##.......Main isolator switch
S14PH....................High pressure switch
TC01,TC02 ............Optocoupler (analog to digital signal)
TR1 ........................Transfo control circuit
TR2 ........................Transfo supply controller + digital inputs
V1...........................V-meter
Y11S ......................12% capacity step for compressor
Y15S ......................Liquid injection valve of the compressor
Y16S ......................Liquid line solenoid valve
BEFORE OPERATION
Checks before initial start-up
After the installation of the unit, check the following before switching
on the circuit breaker:
1Field wiring
Make sure that the field wiring between the local supply panel
and the unit has been carried out according to the instructions
described in the installation manual, according to the wiring
diagrams and according to European and national regulations.
2Additional interlock contact
Additional interlock contacts (S*L) must be provided (e.g.
flowswitch, contact of pump motor contactor). Make sure that
they have been installed between the appropriate terminals
(refer to the wiring diagram supplied with the unit). They must be
normal open contacts.
3Fuses or protection devices
Check that the fuses or the locally installed protection devices
are of the size and type specified in the installation manual.
Make sure that neither a fuse nor a protection device has been
bypassed.
Not included with standard unit
Not possible as option Possible as option
Obligatory # ##
Not obligatory * **
Make sure that the circuit breaker on the power supply
panel of the unit is switched off.

Operation manual
5ERAP110~170MBYNN
Air-cooled condensing units
4PW22681-1
4Earth wiring
Make sure that the earth wires have been connected properly
and that the earth terminals are tightened.
5Internal wiring
Visually check the switch box on loose connections or damaged
electrical components.
6Fixation
Check that the unit is properly fixed, to avoid abnormal noises
and vibrations when starting up the unit.
7Damaged equipment
Check the inside of the unit on damaged components or
squeezed pipes.
8Refrigerant leak
Check the inside of the unit on refrigerant leakage. If there is a
refrigerant leak, call your local dealer.
9Oil leak
Check the compressor on oil leakage. If there is an oil leak, call
your local dealer.
10 Stop valves
Open the liquid line, discharge and suction (if provided) stop
valves completely.
11 Air inlet/outlet
Check that the air inlet and outlet of the unit is not obstructed by
paper sheets, cardboard, or any other material.
12 Power supply voltage
Check the power supply voltage on the local supply panel. The
voltage must correspond to the voltage on the identification label
of the unit.
Power supply connection and crankcase heating
To switch on the crankcase heater proceed as follows:
1Switch on the circuit breaker on the local supply panel. Make
sure that the unit is "OFF".
2The crankcase heater is switched on automatically.
3Check the supply voltage on the supply terminals L1, L2, L3, by
means of a voltmeter. The voltage must correspond to the
voltage indicated on the identification label of the unit. If the
voltmeter reads values which are not within the ranges specified
in the technical data, check the field wiring and replace the
supply cables if necessary.
4Check the LED on the reverse phase protectors. If it lights up,
the phase order is correct. If not, switch off the circuit breaker
and call a licensed electrician to connect the wires of the power
supply cable in the correct phase order.
5Check if the crankcase heaters are warming up.
After 8 hours, the unit is ready for operation.
General recommendations
Before switching on the unit, read following recommendations:
1When the complete installation and all necessary settings have
been carried out, close all front panels of the unit.
2The service panels of the switch boxes may only be opened by a
licensed electrician for maintenance purposes.
3To avoid damage to the LCD display of the digital controller,
never switch off the power supply during winter.
OPERATION
The ERAP units are equipped with a digital controller offering a user-
friendly way to set up, use and maintain the unit.
This part of the manual has a task-oriented, modular structure. Apart
from the first section, which gives a brief description of the controller
itself, each section or subsection deals with a specific task you can
perform with the unit.
Digital controller
User interface
The digital controller consists of an alphanumeric display, labelled
keys which you can press and a number of LEDs.
■Digital built-in controller
Figure - Digital built-in controller
■Digital remote controller (to be ordered separately)
Figure - Digital remote controller
In order to avoid compressor damage, it is necessary to
switch on the crankcase heater for at least 8 hours before
starting the compressor after a long period of standstill.
fkey, to enter the main menu
okey, to start up or to shut down the unit.
pkey, to enter the safeties menu or to reset an alarm.
g
h
keys, to scroll up or down through the screens of a menu
(only in case W, Xor Cappears) or to raise, respectively
lower a setting.
qkey, to confirm a selection or a setting.
okey, to start up or to shut down the unit.
pkey, to enter the safeties menu or to reset an alarm.
k
key, to scroll through the screens of a menu (only in case
W, Xor Cappears) or to raise, respectively lower a
setting.
qkey, to confirm a selection or a setting.
ukey, to enter the readout menu.
skey, to enter the setpoint menu.
zkey, to enter the user settings menu.
ekey, to enter the timers menu.
rkey, to enter the history menu.
tkey, to enter the info menu.
ykey, to enter the input/output status menu.
akey, to enter the user password menu.
dkey, has no effect on ERAP units.
ikey, has no effect on ERAP units.

ERAP110~170MBYNN
Air-cooled condensing units
4PW22681-1
Operation manual
6
How to enter a menu
■Digital built-in controller (main menu)
Scroll through the main menu using the g and h keys to move
the  mark in front of the menu of your choice. Push the qkey
to enter the selected menu.
■Digital remote controller
Press the corresponding menu key indicated in "User interface",
paragraph "Digital remote controller" on page 5
Connection of a remote digital controller to the unit
For a remote digital controller a cable length of up to 600 metres
between the remote digital controller and the unit is allowed. This
gives the opportunity to control the unit from a considerable distance.
Refer to "Cable for remote digital controller" in the installation manual
for cable specifications.
Working with the unit
This chapter deals with the everyday usage of the unit. Here, you will
find how to perform routine tasks, such as:
■"Setting the language" on page 6
■"Switching the unit on" on page 6
■"Consulting actual operational information" on page 6
■"Resetting the unit" on page 7
Setting the language
If wanted, the operating language can be changed to any of the
following languages: English, German, French, Spanish or Italian.
1Enter the usersettings menu. Refer to chapter "How to enter a
menu" on page 6
2Select the appropriate field using the qkey.
3Press qto change the operating language until the desired
language is active.
Switching the unit on
1Press the Jkey on the controller.
Depending on wheter or not a remote ON/OFF switch has been
configured (refer to the installation manual), the following
conditions may occur.
When no remote ON/OFF switch is configured, the LED inside
the Jkey lights up and an initialization cycle is started. Once all
the timers have reached zero, the unit starts up.
When a remote ON/OFF switch is configured, the following table
applies:
2If the condensing unit does not start after a few minutes, refer to
"Troubleshooting" on page 13.
Switching the unit off
If no remote on/off switch is configured:
Press the okey on the controller.
The LED inside the okey goes out.
If a remote on/off switch is configured:
Press the okey on the controller or switch the unit off using the
remote on/off switch.
The LED inside the okey goes out in the first case and starts
blinking in the second case.
Consulting actual operational information
1Enter the readout menu. Refer to the chapter "How to enter a
menu" on page 6.
The controller automatically shows the first screen of the
readout menu which provides the following information:
•   or   : manual/automatic control
mode operation. If the automatic control mode is selected, the
controller will indicate the active temperature setpoint. Depending
on the status of the remote contact, setpoint one or setpoint two
is active.
•
  : actual temperature of sensor thermostat R4T.
2Press the hkey to enter the next screen of the readout menu.
The   screen of the readout menu provides
information concerning the status of the different circuits.
•  : actual status of circuit.
When the circuit is ON, the following status information may
appear.
•  : 40% - this percentage refers to the activated capacity valve of
that specific circuit.
NOTE Temperature readout tolerance: ±1°C.
Legibility of the alphanumeric display may decrease in
direct sunlight.
NOTE When a remote digital controller is connected to a
stand-alone unit, the adress of the remote digital
controller has to be set to 2 by means of the DIP-
switches on the back of the remote digital controller.
Refer to the installation manual "Setting the adresses
on the remote digital controller" for setting the adress.
 
 
 
 
 
 
  
 
Local key Remote switch Unit oo
oo LED
ON ON ON ON
ON OFF OFF Flashing
OFF ON OFF OFF
OFF OFF OFF OFF
In case of emergency, switch off the unit by pushing the
emergency stopbutton.
NOTE Also consult "Defining the capacity limitation settings"
on page 10 and "Customization in the service menu"
chapter "Setting of the changeable inputs and outputs"
in the installation manual.
NOTE When a circuit is in a high pressure setback, the
indication of capacity will be flashing. A high pressure
setback is a prevention of load-up or a forced load-
down caused by a too high pressure.

Operation manual
7ERAP110~170MBYNN
Air-cooled condensing units
4PW22681-1
When a circuit is OFF, the following status information may
appear.
•   : one of the circuit safety devices is activated
(refer to "Troubleshooting" on page 13).
•
 : the circuit is limited by a remote contact.
•
  : the actual value of one of the software timers is
not zero (refer to "Timers menu" on page 8).
•
  the circuit is ready to start up when extra cooling
load is needed.
The preceding OFF messages are written down in order of priority. If
one of the timers is busy and one of the safeties is active, the status
information says   .
The   is written down on the bottom of the screen.
The percentage is the actual cooling capacity of the unit.
3Press the hkey to enter the next screen of the readout menu.
The   screen of the readout menu provides
information concerning the pressures of circuit.
■  : high pressure of the refrigerant in circuit. The first
number stands for the pressure in bar, the second number
stands for the bubble point saturation temperature in degrees
Celsius.
■
 : low pressure of the refrigerant in circuit. The first
number stands for the pressure in bar, the second number
stands for the dew point saturation temperature in degrees
Celsius.
4Press the hkey to enter the next screen of the readout menu.
This menu is available if voltage and current transmitters are
installed. This readout menu provides information concerning
the voltage and the compressor current.
5Press the hkey to enter the next screen of the readout menu.
To consult actual operational information about the ambient
temperature and the total running hours of the compressor.
6Press the gkey to return to the other readout menus.
Adjusting the temperature setpoint
The unit provides definition and selection of two independent
temperature setpoints.
■   : setpoint 1,
■   : setpoint 2.
The selection between setpoint 1 and 2 is done by a remote dual
setpoint switch (to be installed by the customer). The actual active
setpoint can be consulted in the readout menu.
If the manual control mode is selected (refer to "Usersettings menu"
on page 8), none of the above-mentioned setpoints will be active.
To adjust a setpoint, proceed as follows:
1Enter the setpoints menu. Refer to the chapter "How to enter a
menu" on page 6.
If the user password is disabled for setpoint modifications (refer
to "Usersettings menu" on page 8), the controller will
immediately enter the setpoints menu.
If the user password is enabled for setpoint modifications, enter
the correct code using the g and h keys (refer to "User
password menu" on page 9). Press qto confirm the password
and to enter the setpoints menu.
2Select the setpoint to be adjusted using the qkey.
A setpoint is selected when the cursor is blinking behind the
setpoint's name.
The "
 " sign indicates the actual active temperature setpoint.
3Press the gand h keys to adjust the temperature setting.
The default, limit and step values for the cooling temperature
setpoints are:
4Press qto save the adjusted temperature setpoint.
When the setting has been confirmed, the cursor switches to the
next setpoint.
5To adjust other setpoints, repeat from step 2.
Resetting the unit
When a unit safety occurs, one compressor is shut down. The
safeties menu will indicate which safety is activated. The 
 screen of the readout menu will indicate   

. The red LED inside the pkey lights up and the buzzer
inside the controller is activated.
If the unit has been shut down due to a power failure, it will carry out
an autoreset and restart automatically when the electrical power is
restored.
To reset the unit, proceed as follows:
1Press the pkey to acknowledge the alarm.
The buzzer is de-activated.
The controller automatically switches to the corresponding
screen of the safeties menu: unit safety or circuit safety or
network safety.
2Find the cause of shutdown and correct.
Refer to "Listing activated safeties and checking the unit status"
on page 11 and "Troubleshooting" on page 13.
When a safety can be reset, the LED under the pkey starts
blinking.
3Press the pkey to reset the safeties that are no longer active.
If required, enter the   or the 
 . (Refer to the installation manual "Setting the
password for safety reset".)
Once all safety devices are de-activated and reset, the LED
under the pkey goes out. If one of the safeties is still active, the
LED under the pkey goes on again. In this case, return to
step 2.
NOTE The customer is also allowed to define a setpoint in
function of an analog input.
NOTE Refer to "Customization in the service menu" chapter
"Setting of the changeable inputs and outputs" in the
installation manual

default value

limit values(a)
(a) The lower limit of the cooling temperature setpoint can be
adapted by changing the minimum operating temperature in
the service menu (refer to the installation manual). The
following values apply:
 : 2°C, 0°C, –5°C, –10°C
! --> "
step value
#$ 
NOTE Also consult "Defining the floating setpoint settings" on
page 10.
If the user shuts down the power supply in order to repair a
safety, the safety will automatically be reset after power-up.
NOTE The history information, i.e. the number of times a unit
safety or a circuit safety occurred and the unit status at
the moment of shutdown, can be checked by means of
the history menu.

ERAP110~170MBYNN
Air-cooled condensing units
4PW22681-1
Operation manual
8
Advanced features of the digital controller
This chapter gives an overview and a brief functional description of
the screens provided by the different menus. In the following chapter,
you will find how you can set up and configure the unit using the
various menu functions.
All menus are directly accessible using the corresponding key on the
digital controller or through the main menu (refer to "How to enter a
menu" on page 6). The down arrow Xon the display indicates that
you can go to the next screen of the current menu using the hkey.
The up arrow Won the display indicates that you can go to the
previous screen of the current menu using the gkey. If Cis
displayed, this indicates that you can either return to the previous
screen or can go to the next screen.
Readout menu
Setpoints menu
Depending upon the settings in the user settings menu, the
"setpoints" menu can either be entered directly or by means of the
user password.
Usersettings menu
The "usersettings" menu, protected by the user password, allows a
full customization of the units.
Timers menu
Safeties menu
The "safeties" menu provides useful information for trouble shooting
purposes. The following screens contain basic information.
To consult actual operational informa-
tion about the control mode.
To consult information about the unit
status.
To consult information about the
pressures.
To consult actual operational
information about the ambient
temperature, the total running hours of
the compressor and the number of
compressor starts.
To define the temperature setpoints.
To define the manual settings and to
activate or de-activate manual control
mode or thermostat mode.
To define the thermostat settings.
To define the capacity limitations (first
screen).
To define the capacity limitations
(second screen).
To define the fan or pump settings.
%&  #$#
$  #'$#
%(  
 
###)
%( $  
 *$#+ , -#$'
 !$!+ , -$
%& . 
#####/ #####
 #$#
 #$#
 #$#
%&  

 #)
0 
%( $
#1#1
%($ $ 
  $
##)
##)
%($ $ 
2##)
!##)
%( 
 ###1
  ###1
  /##
To define the schedule timer.
According to the settings of

 and   
following screens will be available or
not.
To define the dual evaporator pump.
To define the display settings (first
screen).
To define the display settings (second
screen).
To define wheter or not a password is
needed to enter the setpoints menu.
To the service menu (only a qualified
installer is allowed to access this
menu).
To check the actual value of the general
software timer.
To check the actual value of the
compressor timer. (first screen)
To check the actual value of the
compressor timer. (second screen)
To check the actual value of the
compressor startup timer and the stop
timer.
To consult information about the unit
safety which caused the shutdown.
To consult information about the circuit
safety which caused the shutdown.
To consult information about the
network safety which caused the
shutdown.
To consult information about the dual
pump which caused the shutdown.
%(  
 
  
%( #  #2
#####  ####
#####  ####
#####  ####
%(  $ 
$ 
   #!'/
%(  
  
 

%(  
 ##/##
  ###
%(  
  
  
%(  
 ####
%&  
###1 ###1
  ###1
  ##1
%(  
$  ##1
%(  
###1 ###1
%3  
###1 ##1
%&  
#   
%&  
  
%& 4 
#! $
%&  
#  

Operation manual
9ERAP110~170MBYNN
Air-cooled condensing units
4PW22681-1
Along with the basic information, more detailed information screens
can be consulted while the safety menu is active. Press the qkey.
Screens similar to the following will appear.
History menu
The "history" menu contains all the information concerning the latest
shutdowns. The structure of those menus is identical to the structure
of the safeties menu. Whenever a failure is solved and the operator
performs a reset, the concerning data from the safeties menu is
copied into the history menu.
Additionally the number of safeties that already occured, can be
consulted on the first line of the history screens.
Info menu
Input/output menu
The "input/output" menu gives the status of all the digital inputs and
the relay outputs of the unit.
User password menu
Tasks of the user settings menu
Entering the user settings menu
The user settings menu is protected by the user password, a 4-digit
number between #### and **** .
1Enter the
 $ (Refer to the chapter "How to
enter a menu" on page 6).
The controller will request the password.
2Enter the correct password using the g and h keys.
3Press qto confirm the password and to enter the user settings
menu.
The controller automatically enters the first screen of the user
settings menu.
To define settings of a custom function;
1Go to the appropriate screen of the usersettings menu using the
g and h keys.
2Position the cursor behind the parameter to be modified using
the qkey.
3Select the appropriate setting using the g and h keys.
4Press qto confirm the selection.
When the selection has been confirmed, the cursor switches to
the next parameter which can now be modified.
5Repeat from instruction 2 onwards to modify the other
parameters.
To check the time and control mode
at the moment of the unit shutdown.
To check which was the sensor
temperature.
To check which was the status of the
compressors at the moment of
shutdown.
To check which were the pressures of
the circuit at the moment of shutdown.
To check which were the total amount of
running hours of the compressor and
the ambient temperature at the moment
of shutdown.
To consult time and date information.
To consult additional information
about the unit such as the unit type
and the refrigerant used.
To consult information about the
controller's software version.
To consult information about the
PCB.
To check whether or not the emergency
stop device is active and if the air- or
waterflow is right.
To check the status of the high pressure
switch and of the reverse phase
protector.
To check the status of the discharge
thermal protector and the compressor
thermal protector.
%&  ##
#   
##/##  ###
 
%(  ##
#   
$ #'$#
%(  ##
#   
 
%(  ##
#   
 *$#+ , -#$'
 !$!+ , -$
%(  ##
#   
 #####/ $
#$#
%&  
 ##/##
  ###
%(  
# 
  2
 !#
%(  
!$#" ##'#-
  4
%3  
2$#-##
2$"#-#!
5  #
%&  
  4
 4
%(  
  $$ 4
 $$$4
  4
%(  
 $$$4
 $$$4
To check the status of the changeable
digital inputs.
To check the status of the power relays.
To check the capacity mode.
To check the status of the fanspeed
relays.
To check the status of the air- or
waterflow contact and the alarm
contact.
To check the status of the changeable
relay output.
To change the user password.
%($ $ 
 
 
2 
%(  
   
   
  
%(  
)
 
4 #2#$#6
%(  
  
  
  2
%(  
$ 
 

%3$ 
! 
 $$ 
    
%  
  ####
 ####

ERAP110~170MBYNN
Air-cooled condensing units
4PW22681-1
Operation manual
10
Defining and activating the control mode
The unit is equipped with a thermostat which controls the capacity of
the unit.
Two different control modes exist:
■Manual control mode: the operator controls the capacity
himself -  
• 0 (air flow in manual mode): off, low, medium or high.
•
 (capacity step in manual mode): 0%, 30%~100%.
■Thermostat mode: uses the thermostat control to control the
capacity of the unit - 
Defining the thermostat settings
When automatic control mode is selected, the unit uses a thermostat
function to control the cooling capacity. However, the thermostat
parameters are not fixed and can be modified via the $
 screen of the user settings menu.
The default, limit and step values for the thermostat parameters are
shown in "Annex I" on page 15.
Defining the capacity limitation settings
A capacity limitation can be activated:
■  :
•   see "Defining the schedule timer" on
page 10.
•
   when a changeable input is configured as
capacity limitation.
•
 : to activate capacity limitation 1.
•
  : the capacity limitation is not active.
■ 2!   : capacity limitation value of circuit 1 in
case of capacity limitation 1/2/3/4.
Defining the flow control settings
The  screen of the user settings menu allows the user
to define the pump-leadtime and pump-lagtime.
■
 : used to define the time that the fan or pump-
motor must run before the unit starts.
■  : used to define the time that the fan or
pumpmotor keeps running after the unit is stopped.
Defining the schedule timer
To activate the screens of the schedule timer or holiday period, these
first need to be enabled by changing their setting to in the appropriate
screen. To de-activate the schedule timer or holiday period, their setting
needs to be reset to . (See "Usersettings menu" on page 8.)
The   screen of the user settings menu allows the
user to define the schedule timer settings.
Each day of the week can be appointed to a group. The actions defined
in a group will be executed in each day belonging to that group.
■  ,  ,  ,  ,  ,  and  : used to define to which
group each day of the week belongs (  /  /  / 2 / ! ).
■For each of the four groups up to nine actions can be set, each
with their respective timing. Actions include: putting the unit on/
off and setting capacity limitation.
■Beside these four groups there is also a holiday period group
which is set the same way as the other groups. Up to 12 holiday
periods can be entered in the   screen. During these
periods the schedule timer will follow the settings of the holiday
period group.
Defining dual evaporator fan/pump control
The  $  screen of the user settings menu allows the
user to define the steering of 2 evaporator fans/pumps (for this to be
possible a changeable digital output has to be configured for a
second evaporator fan/pump in the service menu). Refer to the
installation manual.
■
 : used to define which kind of control will be used for the
two evaporator pumps. When automatic rotation is chosen the
offset on running hours also has to be entered.
•  : pump 1 and pump 2 will alternate to the offset on RH.
•
   : pump 1 will always start up first.
•
   : pump 2 will always start up first.
■    : used to define the offset in running hours
between the two pumps. Used to switch over between pumps
when they work in automatic rotation mode.
Defining the floating setpoint settings
The   screen of the user settings menu allows
the active setpoint to be modified in function of the ambient. The
source and settings of the floating setpoint can be configured by the
user.
■
 : used to define the mode of the floating setpoint.
•   : floating setpoint is not activated.
•
 : floating setpoint is altered based on the ambient
temperature.
■ .$  : used to define maximum value that can be added
to the active setpoint.
■  : used to define the ambient (source) at which the floating
setpoint value is equal to zero.
■  : used to define the rise in floating setpoint value for 10°C
drop in ambient.
Defining the display settings
The   screens of the usersettings menu allows
the user to define the choice of language, time and date.
■  : used to define the language of the displayed
information of the controller (on the first screen). (Push the q
button repeatedly to change the operating language).
■  : used to define the present time (on the second screen).
■  : used to define the present date (on the second screen).
NOTE To activate manual control mode, select
 as
present mode. To deactivate the manual control mode,
select  as present mode.
NOTE ■If changed on one of the units in a DICN
configuration, this setting is transferred to all other
units in the network.
■A functional diagram showing the thermostat
parameters can be found in "Annex I" on page 15.
NOTE Refer to "Customization in the service menu",
chapter "Setting of the changeable digital
inputs and outputs" in the installation manual
NOTE A functional diagram showing the schedule timer
working can be found in "Annex I" on page 15.
NOTE
The unit always works with "last command". This means
that the last command given, whether manually by the
user or by the schedule timer, is always executed.
Examples of command that can be given are switching
the unit on/off or changing a setpoint.
NOTE A functional diagram showing the floating setpoint
working can be found in "Annex III" on page 15.

Operation manual
11 ERAP110~170MBYNN
Air-cooled condensing units
4PW22681-1
Defining BMS control
 allows the user to control the unit from a supervisory system.
The   screen and   screen of the
service menu have to be used to set BMS parameters. Refer to
"Customization in the service menu" chapter "Defining the BMS
settings" in the installation manual.
Tasks of the timers menu
Checking the actual value of the software timers
As a protective measure and to ensure correct operation, the
controller's software features several countdown timers:
■LOADUP (  – refer to the thermostat parameters): starts
counting when a thermostat step change has occurred. During the
countdown, the unit is not able to enter a higher thermostat step.
■LOADDOWN (  – refer to the thermostat parameters): starts
counting when a thermostat step change has occurred. During
the countdown, the unit will not be able to go to a lower
thermostat step.
■FLOWSTART (  – 15 sec): counts down when the
airflow/waterflow interlock contact is closed. During the
countdown, the unit cannot start up.
■FLOWLEAD (  – refer to the flow control settings):
starts counting whenever the unit is switched on. During the
countdown, the unit cannot start up.
■FLOWLAG (  – refer to the flow control settings): starts
counting whenever the unit is switched off. During the
countdown, the fan motor or pump motor keeps running.
■STARTTIMER ( $  – 10 sec): starts counting
whenever a compressor starts up. During the countdown, no
other compressor can start up.
■GUARDTIMER (
 – 60 sec): starts counting when the
compressor has been shut down. During the countdown, the
compressor cannot be restarted.
■ANTIRECYCLING (  – 600 sec): starts counting when the
compressor has started. During the countdown, the compressor
cannot be restarted.
■STARTUPTIMER (  – 180 sec): starts counting
when the compressor has started. During the countdown, the
compressor is limited to a maximum capacitystep of 30%.
To check the actual value of the software timers, proceed as follows:
1Enter the
  . (Refer to the chapter "How to enter a
menu" on page 6.)
The controller displays the actual value of the  
the loadup timer, the loaddown timer, the flowstart timer, the flow-
stop timer (when the unit is on and the flowstart timer has reached
zero), the pumplead timer and the pumplag timer.
2Press the hkey to check the compressor timers.
The controller shows the actual value of the 
 : the guard timers (one per circuit) and the antirecycling
timers (one per circuit).
3Press the hkey to check the remaining timers.
The controller shows the actual value of the   .
Tasks of the safeties menu
Listing activated safeties and checking the unit status
If the alarm buzzer is activated and the user presses the pkey, the
controller automatically enters the safeties menu.
■The controller will enter the   screen of the safeties
menu when a unit safety was the cause of shutdown.
■The controller will enter the    screen of the
safeties menu when a safety of the circuit was activated.
1Press the pkey when the alarm buzzer is activated.
The appropriate safety screen with the basic information
appears. Press the qkey to see the detailed information.
2If more than one kind of safety is active (indicated by means of
W, Xor C), use the g and h keys to consult them.
Tasks of the history menu
Checking the safety info and the unit status after a reset
The information available in the safeties menu is also stored in the
history menu, where it is stored after resetting the unit or the circuit.
In this way, the history menu provides a means of checking the unit
status at the moment of the latest shutdown.
To check the safety info and the unit status, proceed as follows:
1Enter the   . (Refer to the chapter "How to enter a
menu" on page 6.)
The controller enters the   screen which contains
the following information: the number of shutdowns, the unit
safety which caused the most recent shutdown and the basic
information at the moment of this shutdown.
2Press the g and h keys to consult the  ,  or 2 
screens.
3Press the qkey to see the detailed information.
Tasks of the info menu
Consulting additional unit information
1Enter the   through the main menu. (Refer to the
chapter "How to enter a menu" on page 6).
The controller enters the   screen which
contains the following information: the time and date.
2Press hto consult the first
  screen.
This screen contains information about the unit name and the
refrigerant used.
3Press hto consult the next   screen.
This screen contains information about the controller's software
version.
4Press hto consult the
  screen.
This screen contains information about the PCB.

ERAP110~170MBYNN
Air-cooled condensing units
4PW22681-1
Operation manual
12
Tasks of the input/output menu
Checking the status of the inputs and outputs
The input/output menu provides a means of checking the status of
the digital inputs and the status of the relay outputs.
The locked digital inputs are:
■   : whether the emergency button has been
pressed.
■  : indicates the status of the air- or waterflow contact:
activated or de-activated.
■     : indicates the actual status of this
safety.
■     : indicates the actual status of
this safety.
■   : indicates the actual status of this safety.
■     : indicates the actual
status of this safety.
■     : indicates the actual
status of this safety.
The changeable digital inputs are:
■   2! : indicates the position of the "enable/disable
capacity limitation" switches.
■ $  : indicates the position of the remote on/off switch.
■
 : indicates the position of the connected switch.
The locked relay outputs are:
■    : indicates whether the circuit is on or off.
■    : indicates whether the circuit is in starmode
or not.
■    : indicates whether the circuit is in deltamode
or not.
■   ) : indicates if the 12% capacity valve of the circuit is
activated.
■   : indicates if the  of the capacity control motor of the
circuit is activated.
■   : indicates if the  of the capacity control motor of
the circuit is activated.
■  4 : indicates the 4 of the potentiometer of
the circuit (Ω).
■     : indicates if the fans of fanstep 1 for the circuit
are on or not.
■     : indicates if the fans of fanstep 2 for the circuit
are on or not.
■    2 : indicates if the fans of fanstep 3 for the circuit
are on or not.
■  : indicates the status of this voltage free contact.
It is activated if the fan motor or the pump motor should be ON.
■ $  : indicates the status of this voltage free contact. It
is activated if there is any alarm on the unit.
The changeable relay outputs are:
■
   : indicates the status of the second evaporator
pump.
■ ##)  : indicates when the unit is working at 100%.
■   : indicates the closed status of the changeable
digital output.
The changeable analog inputs are:
■ $$ #7 : indicates the status of the analog input
■ $$#$# : indicates the status of the analog input
■ $$ #7 : indicates the status of the analog input
To check the inputs and outputs, proceed as follows:
1Enter the    . (Refer to the chapter "How to
enter a menu" on page 6.)
The controller enters the first   screen.
2Consult the other screens of the input/ouput menu using the g
and h keys.
Tasks of the user password menu
Changing the user password
Access to the user settings menu and the setpoints menu is
protected by the user password (a 4-digit number between #### and
**** ).
To change the user password, proceed as follows:
1Enter the
 $ (Refer to the chapter "How to
enter a menu" on page 6).
The controller will request the password.
2Enter the correct password using the g and h keys.
3Press qto confirm the password and to enter the password
menu.
The controller requests the new password.
4Press qto start the modification.
The cursor is positioned behind   .
5Enter the new password using the g and h keys.
6Press qto confirm the new password.
When the new password has been confirmed, the controller will
ask to enter the new password a second time (for safety
reasons). The cursor is positioned behind  .
7Enter the new password again using the g and h keys.
8Press qto confirm the new password.
NOTE The default user password is
2! .
NOTE The actual password will only be changed when the
new password and the confirmed password have the
same value.

Operation manual
13 ERAP110~170MBYNN
Air-cooled condensing units
4PW22681-1
TROUBLESHOOTING
This section provides useful information for diagnosing and
correcting certain troubles which may occur in the unit.
Before starting the troubleshooting procedure, carry out a thorough
visual inspection of the unit and look for obvious defects such as
loose connections or defective wiring.
Before contacting your local dealer, read this chapter carefully, it will
save you time and money.
Overview of safety messages
When a safety device was activated, stop the unit and find out why
the safety device was activated before resetting it. Under no
circumstances safety devices may be bridged or changed to a value
other than the factory setting. If the cause of the problem cannot be
found, call your local dealer.
Symptom 1:The unit does not start, but the ON LED lights up
Symptom 2:The unit does not start, but the ON LED is flashing
Symptom 3:The unit does not start and the ON LED does not light up
3
Symptom 4: The circuit does not start up
Symptom 5: One of the following safety devices is activated
5.1
5.2
5.3
5.4
When carrying out an inspection on the supply panel or on
the switch box of the unit, always make sure that the circuit
breaker of the unit is switched off.
Message safety menu Symptom
 
##  3
#   5.7
#*    10
#8   10
  
   5.5
2   5.3
-   5.8
" 5.1
2   5.6
!  5.2
8   10
8   10
*2$  8
*!$  9
 
#   5.7
POSSIBLE CAUSES CORRECTIVE ACTION
All thermostat contacts are open. Check the thermostat contacts.
The flowstart timer is still running. The unit will start after approx. 15
seconds. Make sure that the cooling
source is flowing over/through the
evaporator.
The circuit can not start up. Refer to Symptom 4: The circuit
does not start up.
Unit is in manual mode (all
compressors at 0%). Check on the controller.
Power supply failure. Check the voltage on the supply
panel.
Blown fuse or interrupted protection
device. Inspect fuses and protection devices. Replace by fuses of the
same size and type (refer to
"Electrical specifications" on
page 1).
Loose connections. Inspect connections of the field
wiring and the internal wiring of the
unit. Tighten all loose connections.
Shorted or broken wires. Test circuits using a tester and repair
if necessary.
POSSIBLE CAUSES CORRECTIVE ACTION
The remote ON/OFF input is
enabled and the remote switch is off. Put the remote switch on or disable the remote ON/OFF input.
POSSIBLE CAUSES CORRECTIVE ACTION
The unit is in failure mode. Refer to Symptom 5: One of the
following safety devices is activated.
One of the following safety devices is
activated:
•Air- or waterflow contact (S9L)
• Emergency stop
Refer to Symptom 5: One of the
following safety devices is activated.
The ON LED is broken. Contact your local dealer.
POSSIBLE CAUSES CORRECTIVE ACTION
One of the following safety devices is
activated:
• Compressor thermal protector (Q*M)
•Overcurrent relay (K*S)
• Discharge thermal protector (S*T)
•Low pressure
• High pressure switch (S*PH)
•Reverse phase protector (R*P)
Check on the controller and refer to
Symptom 5: One of the following
safety devices is activated.
The anti-recycling timer is still active. The circuit can only start up after
approximately 10 minutes.
The guard timer is still active. The circuit can only start up after
approximately 1 minute.
The circuit is limited. Check the enable/disable capacity
limitation remote contact.
Symptom 5.1: Overcurrent relay of compressor
POSSIBLE CAUSES CORRECTIVE ACTION
Failure of one of the phases. Check fuses on the supply panel or
measure the supply voltage.
Voltage too low. Measure the supply voltage.
Overload of motor. Reset. If the failure persists, call your
local dealer.
RESET Push the blue button on the over-
current relay inside the switch box
and reset the controller.
Symptom 5.2: Low pressure
POSSIBLE CAUSES CORRECTIVE ACTION
Air- or waterflow to heat exchanger
too low. Increase the air- or water flow.
Shortage of refrigerant. Check for leaks and refill refrigerant,
if necessary.
Unit is working out of its operation
range. Check the operation conditions of the unit.
RESET After pressure rise, this safety resets
automatically, but the controller still
needs to be reset.
Symptom 5.3: High-pressure switch
POSSIBLE CAUSES CORRECTIVE ACTION
Condenser fan does not operate
properly. Check that the fans turn freely. Clean if necessary.
Dirty or partially blocked condenser. Remove any obstacle and clean
condenser coil using brush and
blower.
Inlet air temperature of the
condenser is too high. The air temperature measured at the inlet of the condenser may not
exceed 43°C.
Fan turning in the wrong direction. Two phases of the power supply to
the fan motor must be inverted (by a
licensed electrician).
RESET After pressure decrease, push the
button on the high-pressure switch
and reset the controller.
Symptom 5.4: Fan thermal protector is activated
POSSIBLE CAUSES CORRECTIVE ACTION
Mechanical failure (fan is blocked). Check that the fan rotates freely.
Air flow in the unit too low or outdoor
temperature too high. Clean the air heat exchanger properly.
RESET After temperature decrease, the
thermal protector is reset
automatically.
If the protector is activated
frequently, replace the motor or call
your local dealer.

ERAP110~170MBYNN
Air-cooled condensing units
4PW22681-1
Operation manual
14
5.5
5.6
5.7
5.8
Symptom 6: Unit stops soon after operation
Symptom 7: Excessive noises and vibrations of the unit
Symptom 8:The alarm message shows
$ 
8
Symptom 9:The alarm message shows $ 
9
Symptom 10: Sensor or transmitter error
10
MAINTENANCE
In order to ensure optimal availability of the unit, a number of checks
and inspections on the unit and the field wiring have to be carried out
at regular intervals.
If the unit is used for air conditioning application, the described
checks must be executed at least once a year. In case the unit is
used for other applications, the checks must be executed every
4 months.
Maintenance activities
■Air heat exchanger
Remove dust and any other contaminant from the coil fins using
a brush and a blower. Blow from the inside of the unit. Take care
not to bend or damage the fins.
■Field wiring and power supply
•Check the power supply voltage on the local supply panel. The
voltage must correspond to the voltage marked on the
identification label of the unit.
•Check the connections and make sure they are properly fixed.
•Check the proper operation of the circuit breaker and the earth
leak detector provided on the local supply panel.
■Internal wiring of the unit
Visually check the switch boxes on loose connections (terminals
and components). Make sure that the electrical components are
not damaged or loose.
■Earth connection
Make sure that the earth wires are still connected properly and
that the earth terminals are tightened.
■Refrigerant circuit
•Check for leaks inside the unit. In case a leak is detected, call
your local dealer.
•Check the working pressure of the unit. Refer to "Switching the
unit on" on page 6.
■Compressor
• Check on oil leaks. If there is an oil leak, call your local dealer.
•Check for abnormal noises and vibrations. If the compressor is
damaged, call your local dealer.
■Fan motor
•Clean the cooling ribs of the motor.
•Check on abnormal noises. If the fan or motor are damaged, call
your local dealer.
■Water sensors
Check that all the water sensors are correctly fixed into the heat
exchanger (see also the sticker attached to the heat exchanger).
Disposal requirements
Dismantling of the unit, treatment of the refrigerant, of oil and of other
parts must be done in accordance with relevant local and national
legislation.
Symptom 5.5: Reverse phase protector is activated
POSSIBLE CAUSES CORRECTIVE ACTION
Two phases of the power supply are
connected in the wrong phase
position.
Invert two phases of the power
supply (by licensed electrician).
One phase is not connected
properly. Check the connection of all phases.
RESET After inverting two phases or fixing
the power supply cables properly,
the protector is reset automatically,
but the controller still needs to be
reset.
Symptom 5.6: Discharge thermal protector is activated
POSSIBLE CAUSES CORRECTIVE ACTION
Unit is working outside the operation
range. Check the operation condition of the unit.
RESET After temperature decrease, the
thermal protector resets
automatically but the controller still
needs to be reset.
Symptom 5.7: Flowswitch is activated
POSSIBLE CAUSES CORRECTIVE ACTION
No air- or waterflow over/through the
evaporator. Check the fan- or water pump.
RESET After finding the cause, the
flowswitch is reset automatically, but
the controller still needs to be reset.
Symptom 5.8: Compressor thermal protector is activated
POSSIBLE CAUSES CORRECTIVE ACTION
Compressor motor coil temperature
too high. Compressor is not cooled sufficiently by the refrigerant medium.
RESET After temperature decrease the
thermal protector is reset
automatically, but the circuit
controller needs to be reset.
If the protector is activated
frequently, call your local dealer.
POSSIBLE CAUSES CORRECTIVE ACTION
The schedule timer is activated and
is in off mode. Work according to the settings in the schedule timer or disable the
schedule timer.
One of the safety devices is
activated. Check safety devices (refer to Symptom 5: One of the following
safety devices is activated).
Voltage is too low. Test the voltage in the supply panel
and, if necessary, in the electrical
compartment of the unit (voltage
drop due to supply cables is too
high).
POSSIBLE CAUSES CORRECTIVE ACTION
Unit has not been fixed properly. Fix the unit as described in the
installation manual.
POSSIBLE CAUSES CORRECTIVE ACTION
The control motor is not reacting due
to bad wiring to the motor or the
motor is damaged.
Check if the wiring to the control
motor is correct and not damaged or
loose.
POSSIBLE CAUSES CORRECTIVE ACTION
The control motor is operating in
reverse due to wrong wiring. Check if the wiring is according to the wiring diagram.
POSSIBLE CAUSES CORRECTIVE ACTION
The wiring is wrong. Check if the wiring is according to
the wiring diagram. Call your local
dealer.
Before carrying out any maintenance or repair activity,
always switch off the circuit breaker on the supply panel,
remove the fuses or open the protection devices of the
unit.
Never clean the unit with water under pressure.
The wiring and power supply must be checked by a
licensed electrician.

Operation manual
15 ERAP110~170MBYNN
Air-cooled condensing units
4PW22681-1
ANNEX I
Thermostat parameters
Thermostat control
The figure below shows the thermostat diagram.
The default value and the upper and lower limits of the thermostat
parameters are listed in the table below.
■If the temperature is below the setpoint, the thermostat control
will check every LOADDOWN TIMER.
According to the deviation to the setpoint, no action, slow load
down (=–3%) or fast load down (=–7%) is required.
■If the temperature is above the setpoint, the thermostat control
will check every LOADUP TIMER.
According to the deviation to the setpoint, no action, slow load
up (=+3%) or fast load up (=+7%) is required.
ANNEX II
Schedule timer example
To come to the schedule above following settings have to be made:
All days assigned to the same group will work according to the
settings of this group.
In this example setting:
■all Mondays, Tuesdays, Thursdays and Fridays will work
according to the settings in group 1 (
 ),
■all Wednesdays will work according to the settings in group 2
(  ),
■all Saturdays and Sundays will work according to the settings in
group 3 ( 2 ),
■all holiday days will work according to the settings in the holiday
group (  ).
All group settings of groups  ,  , 2 , ! and  work similar as
following example (settings for group 1):
ANNEX III
Floating setpoint working
The diagram and table below show the default value and the upper
and lower limits of the floating setpoint parameters on the evaporator.
THERMOSTAT Default value Lower limit Upper limit
Step difference - a (K) 0.8(a)
(a) can only be modified in the service menu
––
Step difference - b (K) 0.5(a) ––
Steplength - c (K) 0.2(a) ––
Loadup timer (sec) 12 12 300
Loaddown timer (sec) 12 12 300
Setpoint (°C) 7.0 4.0 16.0
Setpoint
Fast load up
Slow load up
No action
Slow load down
Fast load down
c b c c b c
a/2 a/2
MARCH
MON TUE WED THU FRI SAT SUN
1G1 2G1 3G2 4G1 5G1 6G3 7G3
8G1 9G1 10 G2 11 G1 12 G1 13 G3 14 G3
15 G1 16 G1 17 G2 18 G1 19 G1 20 G3 21 G3
22 G1 23 H24 H25 H26 H27 H28 H
29 H30 G1 31 G2
Screen 1
Screen 2
Floating setpoint Default value Lower limit Upper limit
Maximum value (°C) 3.0 0.0 5.0
D1 (°C) 20.0 20.0 43.0
D2(a)
(a) rise in floating setpoint value for 10°C drop in ambient
(°C) 5.0 0.0 10.0
%(  
  2
  2

%( #  #2
#2#2  *#2
#####  ####
#2####  ####
61213 20
On
Off
time (h)
%( #  #2
##/##
#"/##  ##$#
2##/##
%( #!  #"
!/##  ##$#
-2/##  ##$#
"#/##  ##$#
0°C
5°C
D2
D1
Max, value
Ambient

ERAP110~170MBYNN
Air-cooled condensing units
4PW22681-1
Operation manual
16
ANNEX IV
 
 ####
 
 
 
 
 
 
  
 
%&  #$#
$  #'$#
 #$#
 #$#
%(  
 
###)
%( $  
 *$#+ , -#$'
 !$!+ , -$
q
q
q
g
h
h
g
h
g
h
h
g
h
g
g
h
gg
h
g
h
g
h
h
g
g
f
%( 
 ###1
  ###1
  /##
%(  
 
  
%&  
###1 ###1
  ###1
  ##1
%(  
$  ##1
h
g
h
g
%(  
#  
%&  ##
#   
##/##  ###
 
%(  ##
#   
$ #'$#
%(  ##
#   
 
%(  ##
#   
 *$#+ , -#$'
 !$!+ , -$
%(  ##
#   
 #####/ $
#$#
%&  ##
   
##/##  ###
 
%(  ##
   
$ #'$#
%(  ##
   
  
%(  ##
   
 *$#+ , -#$'
 !$!+ , -$
%(  ##
   
 #####/ $
#$#
%  
  ####
 ####
 
 ####
h
h
q
%&  
  4
 4
%(  
   
   
  
%(  
  
  
  2
%(  
 $$$4
 $$$4
%($ $ 
 
 
2 
%(  
)
 
4 #2#$#6
%(  
  $$ 4
 $$$4
  4
h
g
h
g
h
g
h
%3$ 
! 
 $$ 
    
gg
h
g
h
%(  
$ 
 

g
qqqq
q
q
qqqq
p
%&  
 ##/##
  ###
%(  
"# 
  2
 !#
%(  
!$#" ##'#-
  4
g
g
h
g
h
%3  
2$#-##
2$"#-#!
5  #
g
h
%&  

 #)
0 
%(  
  
  

%( #  #2
##/##  ##$#
##/##  ##$#
2##/##  ##$#
%( #  #2
#####  ####
#####  ####
#####  ####
g
g
h
g
h
g
%(  $ 
$ 
   #!'/
%(  
 ##/##
  ###
g
h
%(  
  
 

%(  
  
  
%(  
 ####
g
h
%& . 
#####/ #####
 #$#
%3  
###1 ##1
 
 ####
  
p
q
%(  
###1 ###1
g
h
h
h
h
%($ $ 
  $
##)
##)
%( $
#1#1
%($ $ 
2##)
!##)

Zandvoordestraat 300, B-8400 Oostende, Belgium 4PW22681-1