Lennox E210 Instruction manual

1
INDEX
CONTENTS
• INDEX
• GENERAL DESCRIPTION
• THE KEYPAD, MODEL E210
• THE KEYPAD, MODEL E420
• THE KEYPAD REMOTE CONTROLLER (OPTION), MODEL E210
• THE KEYPAD REMOTE CONTROLLER (OPTION), MODEL E420
• FUNCTION
UNIT COMMISSIONING
SELECTING OPERATING MODE
SELECTING SET POINT
• PARAMETERS AND DEVICES
• ADJUSTING WATER TEMPERATURE (SET-POINT)
• ANALOGUE INPUTS, PROBE TEMPERATURES
• MODIFY UNIT PARAMETERS
• OPERATING HOURS
• ALARM CODES
• DEFROST SYSTEM
• FAN SPEED CONTROL
•SAFETY DEVICES
PAGE
1
2
3
4
5
6
7
8
9
10
11-12
13
14-16
17
18
18

2
Keypad located
within the unit
Keypad located
within the unit
*
This equipment is an electronic device that controls packaged water cooling systems via air and reversible air/water
heat pumps.
The thermostat allows the following operations::
- Unit ON/OFF
- Select system operating mode
- Set point adjustment
- Alarm signal relay
- Display temperature
- Status of the unit alarms
- Possibility of remote ON/OFF.
- A remote controller as an option
Control Module
MODEL E420
- Keypad
Located within the unit.
- Control Module
Located at the electrical box
This device controls the operation of the unit, allowing the
regulation of the system.
- Fan Control Plate
Located at the electrical box
Allows the fan voltage to be varied in respect of the condensing
temperature.
*Connection to be made by user
The control supplied incorporated on the unit contains the following devices:
MODEL E210
- Keypad
Located within the unit.
The keypad provides control of the system
- Fan Control Plate
Located at the electrical box
Allows the fan voltage to be varied in respect
of the condensing temperature.
Fan control plate
set
mode
on off
12
Terminal block
set
mode
on off
12
Fan control plate
A remote controller is offered as an option.
To install this optional remote controller proceeded as
follow:
- Connect exactly as indicated in electrical diagram
- The wire should not exceed 50 m.
Remote controller (optional)
2
1
x 1000
Electrical box at the unit
MAXIMUM LENGTH 50m
GENERAL DESCRIPTION
The three cables for connection from the keypad to
the power board must be kept separate from other
cables, using an individual cable channel; and use
shielded cables, with a cross-section of 1 mm.
2
Three-lead shielded cable
with a cross-section of 1mm.
2
REGULATION:
The control makes the system regulation as follow:
- The signals of analague inputs through the inlet and outlet probe temperature and from the refrigerant piping
probe temperature (two for model E 420).
- Receives digital inputs through the status of low, high and end defrost pressostat, flow switch (water flow) status
and from electrical protection of fan and compressor.
According to the valves and status of analogue and digital inputs manages; The out put signals; compressor, fan
and status of and water pump operating, obtaining the regulation of the inlet water temperature to the unit, regulating
the speed of the air fan volume, activating the defrost cycle (heat pump units only); output signals water exchange
heater, water tank heater, and hot gas valve (all these elements are an option) used to protect the unit, and also
activated the alarm codes about, setting pressostat, flow switch, water flow, and the electrical protection of fan and
compressor (see alarm section).
- A group of parameters let the control be programmed for each application.

3
THE KEYPAD INCORPORATED AT THE UNIT, MODEL E210
set
mode
on off
1 2
COMPRESSORS LED
When this LED is continually lit it indicates that the compressor
is operating (in heating or cooling mode, depending on the
operating mode selected); however, when it flashes this
indicates that pausing is taking place which is delaying the
compressor start.
MODE - ON / OFF
BUTTON
Pressing both buttons at
he same time, gets to the
menu level
They also lets move one
level up or down in the
menu.
DEFROST LED
LED ON: The defrosting is in
progress
LED OFF: If defrosting is
disabled or has been completed
LED BLINK: If timing is in
progress (defrost interval)
ELECTRICAL HEATER LED
When this LED is continually lit it indicates that
the internal anti-freeze electrical heater is on,
if the led is off, the internal anti-freeze is off.
COOLING MODE LED
When this LED is continually lit
it indicates that the unit is
operating in cooling mode.
When none of this two leds
COOLING/HEATING are lit, it
indicates that the operating mode
selected is STAND-BY
COOLING MODE LED / HEATING MODE LED
READING DISPLAY
READING DISPLAY
This is the 3-digit display, The inlet water temperature is shown in degrees (default), ºC (when shows decimal
point), o ºF (do not show the decimal point) . The following can also be displayed:
- Values of all parameters controlled by the equipment:
 - Cooling set point, cooling differential temperature
- Heating set point (heat pump units) and heating differential temperature
- Outlet water temperature (as security)
- Inlet water temperature (regulation) 
- Defrost temperature
- Alarm codes.
- The status of all machine functions (operating hours, delay time etc.)
MODE / UP BUTTON
Selects the operating mode between the following:
Stand-by / Cool / Heat
In menu mode, this button acts as a scroll up or up
key (increasing value).
HEATING MODE LED When
this LED is continually lit it
indicates that the unit is
operating in heating mode.
ON - OFF / DOWN BUTTON
Turn the unit ON and OFF, Press once to reset all manually
reset alarms not currently active; all the alarm events per hour
will also be reset even if the alarms are not active.
In menu mode this key acts as a scroll down or down key
(decreasing value)

4
THE KEYPAD INCORPORATED AT THE UNIT, MODEL E420
READING DISPLAY
set
mode
on off
12
34
COMPRESSOR LED
When this LED is continually lit it indicates that the compressor
is operating (in heating or cooling mode, depending on the
operating mode selected); however, when it flashes this
indicates that pausing is taking place which is delaying the
compressor start.
LED 1: Compressor circuit 1
LED 3: Compressor circuit 2
MODE / UP BUTTON
Selects the operating mode between the following:
Stand-by / Cool / Heat
In menu mode, this button acts as a scroll up or up
key (increasing value).
COOLING MODE LED
When this LED is continually lit
it indicates that the unit is
operating in cooling mode.
When none of this two leds
COOLING/HEATING are lit, it
indicates that the operating mode
selected is STAND-BY
COOLING MODE LED / HEATING MODE LED
HEATING MODE LED When
this LED is continually lit it
indicates that the unit is
operating in heating mode.
MODE - ON / OFF
BUTTON
Pressing both buttons at
he same time, gets to the
menu level
They also lets move one
level up or down in the
menu.
ELECTRICAL HEATER LED
When this LED is continually lit
it indicates that the internal anti-
freeze electrical heater is on, if
the led is off, the internal anti-
freeze is off.
READING DISPLAY
This is the 3-digit display, The inlet water temperature is shown in degrees (default), ºC (when shows decimal
point), o ºF (do not show the decimal point) . The following can also be displayed:
- Values of all parameters controlled by the equipment:
 - Cooling set point, cooling differential temperature
- Heating set point (heat pump units) and heating differential temperature
- Outlet water temperature (as security)
- Inlet water temperature (regulation) 
- Defrost temperature
- Alarm codes.
- The status of all machine functions (operating hours, delay time etc.)
ON - OFF / DOWN BUTTON
Turn the unit ON and OFF, Press once to reset all manually
reset alarms not currently active; all the alarm events per hour
will also be reset even if the alarms are not active.
In menu mode this key acts as a scroll down or down key
(decreasing value)

5
THE KEYPAD REMOTE CONTROLLER (OPTION), MODEL E210
MODE BUTTON
Selects the operating mode between the following:
Stand-by / Cool / Heat
2
1
x 1000
READING DISPLAY
This is the 3-digit display, The inlet water temperature is shown in degrees (default), ºC (when shows decimal
point), o ºF (do not show the decimal point) . The following can also be displayed:
- Values of all parameters controlled by the equipment:
 - Cooling set point, cooling differential temperature
- Heating set point (heat pump units) and heating differential temperature
- Outlet water temperature (as security)
- Inlet water temperature (regulation) 
- Defrost temperature
- Alarm codes.
- The status of all machine functions (operating hours, delay time etc.)
COOLING MODE LED
When this LED is continually lit it indicates that the
unit is operating in cooling mode.
MODE - ON / OFF
BUTTON
Pressing both buttons
at he same time, gets
to the menu level
They also lets move
one level up or down
in the menu.
When none of this two leds
COOLING/HEATING are lit, it
indicates that the operating mode
selected is STAND-BY
HEATING MODE LED
When this LED is continually lit it indicates that the
unit is operating in heating mode.
COMPRESSOR LED
When this LED is continually lit it indicates that the
compressor is operating (in heating or cooling mode,
depending on the operating mode selected); however,
when it flashes this indicates that pausing is taking
place which is delaying the compressor start.
LED 1: Compressor circuit 1
LED 2: Compressor circuit 2
ON - OFF BUTTON
Turn the unit ON and OFF, Press once to reset all
manually reset alarms not currently active; all the
alarm events per hour will also be reset even if the
alarms are not active.
DEFROST LED
LED ON: The defrosting is in progress
LED OFF: If defrosting is disabled or has been
completed
LED BLINK: If timing is in progress (defrost interval)
ELECTRICAL HEATER LED
When this LED is continually lit it indicates that the
internal anti-freeze electrical heater is on, if the led
is off, the internal anti-freeze is off.
DOWN BUTTON
In menu mode this key acts
as a scroll down or down
key (decreasing value)
UP BUTTON
In menu mode, this button
acts as a scroll up or up
key (increasing value).

6
THE KEYPAD REMOTE CONTROLLER (OPTION), MODEL E420
2
1
x 100
3
4
READING DISPLAY
This is the 3-digit display, The inlet water temperature is shown in degrees (default), ºC (when shows decimal
point), o ºF (do not show the decimal point) . The following can also be displayed:
- Values of all parameters controlled by the equipment:
 - Cooling set point, cooling differential temperature
- Heating set point (heat pump units) and heating differential temperature
- Outlet water temperature (as security)
- Inlet water temperature (regulation) 
- Defrost temperature
- Alarm codes.
- The status of all machine functions (operating hours, delay time etc.)
MODE BUTTON
Selects the operating mode between the following:
Stand-by / Cool / Heat
COOLING MODE LED
When this LED is continually lit it indicates that the
unit is operating in cooling mode.
COMPRESSOR LED
When this LED is continually lit it indicates that the
compressor is operating (in heating or cooling mode,
depending on the operating mode selected); however,
when it flashes this indicates that pausing is taking
place which is delaying the compressor start.
LED 1: Compressor circuit 1
LED 3: Compressor circuit 2
ON - OFF BUTTON
Turn the unit ON and OFF, Press once to reset all
manually reset alarms not currently active; all the
alarm events per hour will also be reset even if the
alarms are not active.
ELECTRICAL HEATER LED
When this LED is continually lit it indicates that the
internal anti-freeze electrical heater is on, if the led
is off, the internal anti-freeze is off.
When none of this two leds
COOLING/HEATING are lit, it
indicates that the operating mode
selected is STAND-BY
HEATING MODE LED
When this LED is continually lit it indicates that the
unit is operating in heating mode.
MODE - ON / OFF
BUTTON
Pressing both buttons
at he same time, gets
to the menu level
They also lets move
one level up or down
in the menu.
DOWN BUTTON
In menu mode this key acts
as a scroll down or down
key (decreasing value)
UP BUTTON
In menu mode, this button
acts as a scroll up or up
key (increasing value).

7
FUNCTION
SELECTING THE WATER TEMPERATURE OF THE SYSTEM (SET POINT)
SELECTING THE UNIT'S OPERATING MODE
Once cool or heat have been selected water pump will turn on. If cool is the unit's operating mode selected and
the inlet water temperature exceeds the cooling the get point, or if heating mode have been selected and the inlet
water temperature drops below the heating get point, there will be a demand for the compressor to start, then the
compressor led start blinking, witch indicates that is on start compressor temporize, delaying the compressor start,
because of anticycle protection (see page 18), after of this, compressor start and led gets set.
NOTE: When unit is not going to be operating during long periods of time do not turn off power supply.
TURN ON/OFF THE UNIT.
- Pressing button during more than two seconds , lets you turn on or OFF the unit.
The display will show the inlet water temperature or an alarm indication, if E 00 shows, indicates that the init has
been turn off by the remote, located between 93 and 94 terminal at the electrical box, If the unit does not
incorporate this switch, verify that exits an overpass between these terminals, and the leds on the display will lit
(see alarm section). To turn off the unit press button during more than 2 seconds, before disconnect power
supply, wait until water pump stops.
UNIT COMMISSIONING
When all the instructions in the Operating, Service and Installation Manual have been carried out, the unit can be
commissioned as follows:
COOL HEAT STAND BY
on off
on off
on off
The operating mode is always indicated on the display by leds.
Pressing the button repeatedly you can change the unit operating mode, and select the required one:
mode
COOL: The unit is working on cooling mode, the led will lights up on the display
HEAT: The unit is working on heating mode, the led will lights up on the display
STAND BY: The unit is working on stand-by, none led will lights up.
To modify the set point of the unit follow the steps:
Press the buttons and simultaneously and release within two seconds, the display will show up
Press the buttons and again, the display will show up (cooling set point)
Pressing the buttons and ,the display will show up (heating set point)
Once positioned on the set point which should be changed or
Press the buttons and simultaneously and release within two seconds, and the display shows up the
actual set point, and with buttons or may change the set point, among a maximum and a minimum.
Once the set point have been changed press and simultaneously.
To get to the display value, press and simultaneously during more than two seconds, the display will
show up press again and during more than two seconds, and you will be on the display value.
mode
on off
mode
on off
mode
on off
mode
on off
mode
on off
mode
on off
POWER SUPPLY TO THE UNIT
- Set the general cut-off switch to ON (if included), when the unit gets under power supply the display will lights up.

8
HOW TO GET TO PARAMETERS AND DEVICES
NOTE: When leds on the
display lit alternative from
one to the other.
You are on menu mode.
Water temperature adjustment menu
Status temperature probes menu
ST1: Inlet water temperature
ST2: Outlet water temperature
ST3 and ST6: Piping temperature
Active alarms Menu
Configuration parameters menu
Password to access to parameters configuration (number), the password is 38.
Operating hours resources management (compressor, water pump)
HOW TO GET TO MENU MODE
Press and buttons and release within two seconds, to enable the
user to get to the menu mode
A parameter is an internal program reference containing important values which can be set to allow the user or
installer to ensure proper operation of the unit.
A device is, the status list of the elements that comprises the system
Getting to the menu mode enable the user to obtain a status list for the unit's devices, this can be used to read
the probe temperatures or the operating hours for example.
All parameters and devices are structure on levels of visualization as shown bellow:
DISPLAY MENU
Visualizes:
Inlet water temperature
Active alarms
LEVEL 1
Cooling set point
Probe status
ALARMS
PARAMETERS
PASSWORD
OPERATING HOURS
Set point value
Heating set point
SET POINT
Probe value
Active alarms Codes
Codes
Password value (number)
Compressor operating
hours Amount of hours
LEVEL 2 LEVEL 3
MENU STRUCTURE
-----
-----
---
Water pump operating hours
To move through the menu on this way
Press and buttons simultaneously and release within two seconds.
To move through the menu on this way
Press and buttons simultaneously during more than two seconds.
To move through the menu on this way , press:
To move through the menu on this way , press:
Set point value
Amount of hours
mode
on off
mode
on off
mode
on off

SET POINT THERMOSTAT FUNCTION DESCRIPTION
9
COOLING OPERATING MODE
Operation with one compressor is as shown in the diagram taking into account that the temperature above which
the controller takes over is the inlet water temperature. When this temperature exceeds the set point + tolerance
range (differential) the compressor starts to produce cool water. When inlet water temperature gets bellow the set
point the compressor stops. For example: if set point = 10°C and tolerance range (differential)= 2°C, the compressor
will operate when the return water temperature exceeds 10°C and switch off when it returns at 10ºC, and turn on
again when the temperature reaches 12ºC.
Operation with one compressor is as shown in the diagram taking into account that the temperature above which
the controller takes over is also the inlet water temperature. When this temperature drops below the set point -
tolerance range (differential) the compressor starts to produce warm water. When the inlet water temperature
increases beyond the set point + tolerance range (differential) the compressor switches off. For example, if set
point = 41°C and tolerance range = 2°C, the compressor will operate when the return water temperature drops
below 39°C and switch off when it returns at 41ºC.
ºC
Compressor
ON
Compressor
OFF
Set Point + Differential
Set Point
co3
ºC
Step 2
co4
Step 1
Set Point - Differential Set Point
co4
co5
Compressor
ON
Compressor
OFF
Compressor
ON
Compressor
OFF
Set Point + Differential
Set Point
co3
co5
Compressor
ON
Compressor
OFF
Compressor
ON
Compressor
OFF
Step 1
co3
Step 2
ºC
HEATING OPERATING MODE
UNITS with 1 Compressor UNITS with 2 Compressors
AFFECTED PARAMETERS
UNITS with 1 Compressor UNITS with 2 Compressors
Compressor
ON Compressor
OFF
Set Point - Differential Set Point
co4
0,1
ºC
ºC
ºC
ºC
ºC
0,1
0,1
0,1
0,1
DISPLAY
SET POINT
Visualizes:
Inlet water temperature
Active alarms
LEVEL 1
Cooling set point Set point value
Heating set point
LEVEL 2 LEVEL 3
Set point value
1.5
MIN MAX DEF
1 COMPRESSOR
UNITS VALUES
DESCRIPTION
Code which
appears on the
display
1115 9 14
Cooling set point
30 43
---
0
---
0
---
Cooling differential temperature
Heating set point
MAX: Maximum value for the parameter
MIN: Minimum value for the parameter
DEF: The default value, factory set.
UNIT: The units of measure used.
VAR.: Minimum variation allowed
MIN MAX
2
DEF
2
35 43
0
0
0
1.5
1.5
Differential for second compressor
10
41
10
42
UNIT.
See page 7, for adjustment of set point of the system
VAR.
2 COMPRESSOR
UNITS VALUES
Heating differential temperature
25,5
25,5 25,5
25,5
25,5
The water temperature is thermostatically controlled via a set point and a tolerance range (differential)
The operation of these parameters is shown in the following diagram.

10
ANALOGUE INPUTS
Probe St1
Probe St2
Probe St3
Probe St4
Inlet water temperature
Outlet water temperature
Piping temperature at circuit 1
Piping temperature at circuit 2 (ONLY MODEL E420)
AFFECTED PARAMETERS
For every unit without anti-freeze the minimum outlet water temperature should be 5ºC
For applications where the outlet water temperature is lower than 5ºC is necessary to use anti-freeze.
--- ---
HOW TO GET TO PROBE STATUS MENU
Press and buttons and release within two seconds, the display will show up
SET POINT
Probe status
DISPLAY MENU
Visualizes:
Inlet water temperature
Active alarms Press
MIN MAX
1 CIRCUIT UNIT MODEL E210
DEF
0 1 0
0 1 0
UNIT. VAR.
--- ---
MAX: Maximum value for the parameter
MIN: Minimum value for the parameter
DEF: The default value, factory set.
UNIT: The units of measure used.
VAR.: Minimum variation allowed
DESCRIPTION
Code which appears
on the display
2 CIRCUITS UNIT MODEL E210
Unit for measure temperature
H52=0 the temperature is visualized on ºC
H52=1 the temperature is visualized ºF
Unit for measure temperature
H64=0 the temperature is visualized on ºC
H64=1 the temperature is visualized ºF
Probe value
Probe value
Probe value
Probe value
mode
on off
To move through the menu on this way
Press and buttons simultaneously and release within two seconds.
To move through the menu on this way
Press and buttons simultaneously during more than two seconds.
mode
on off
mode
on off
To move through the menu on this way , press:
To move through the menu on this way , press:
Press
mode
on off

11
MODIFY PARAMETERS
Menu of configuration parameters of the unit
PARAMETER
DISPLAY
Press
Press
Press
AMENDABLE PARAMETERS
VISUALIZATION PARAMETERS
To access to parameters modification, a password should be includes to the system, this is not
necessary if you want to visualize the parameters
Press
Press
Press
PASSWORD Insert password (number, 38)
Press
Visualizes:
Inlet water temperature
Active alarms
Visualizes:
Inlet water temperature
Active alarms
Parameter value
Parameter value
Parameter value
Parameter value
Parameter value
Parameter value
Parameter value
To move through the menu on this way
Press and buttons simultaneously and release within two seconds.
To move through the menu on this way
Press and buttons simultaneously during more than two seconds.
mode
on off
mode
on off
To move through the menu on this way , press:
To move through the menu on this way , press:
General configuration parameters of the unit (Values (F))
Parameters configuration concerning to compressor (Values (C))
Parameters configuration concerning to fan and defrost control (Values (F))
Parameters configuration concerning to active alarms (Values (A))
Parameters configuration concerning to water pump (Values (P))
Parameters configuration concerning to anti-freeze (Values (r))
Parameters configuration concerning to defrost cycle (Values (d))
Press
mode
on off
HOW TO GET TO PARAMETERS MENU
Press and buttons and release within two seconds, the display will show up
mode
on off

12
MODIFY UNIT PARAMETERS
--- 1
ºC 0,1
ºC 0,1
ºC 0,1
--- 1
ºC 0,1
ºC 0,1
ºC 0,1
ºC 0,1
MAX: Maximum value for the parameter
MIN: Minimum value for the parameter
DEF: The default value, factory set.
UNIT: The units of measure used.
VAR.: Minimum variation allowed
Unit for measure temperature
H64=0 the temperature is visualized on ºC
H64=1 the temperature is visualized ºF
Differential for second compressor
Heating differential temperature
Cooling differential temperature
Differential for second compressor
Heating differential temperature
2 CIRCUITS UNIT MODEL E420
0 1 0 --- ---
0 1 0
0 25,5 1.5
0 25,5 1.5
0 25,5 1.5
MIN MAX
DESCRIPTION DEF UNID. VAR.
MIN MAX
1 CIRCUIT UNIT MODEL E210
DESCRIPTION DEF
Alarm switch polarity  H45=0 switch opens if out is activated
H45=1 switch closed if out is activated 0 1 0
UNID. VAR.
Cooling differential temperature 0 25,5 1.5
Unit for measure temperature
H52=0 the temperature is visualized on ºC
H52=1 the temperature is visualized ºF 0 1 0
0 25,5 1.5
0 25,5 1.5
Alarm switch polarity  H56=0 switch opens if out is activated
H56=1 switch closed if out is activated

13
The display shows without decimal point until 999 operating hours, If counter have exceed 999, appears a decimal
point and value have to be multiplied by 1.000 (Example: 1.00 hours x 1000).
OPERATING HOURS.
Reset of operating hours counters.
When display shows the compressor or water pump operating hours, the counters may setting zero, pressing
ON/OFF button and release within two seconds.
PARAMETERS
Water pump operating hours
Operating hours compressor 1
Operating hours compressor 2 (if available) model E210
UNIT
MIN MÁX
Operating hours compressor 2 (if available) model E420
No available
CODE
0
0
9.99 hrs/khrs
hrs/khrs
hrs/khrs
0
9.99
9.99
9.99
HOW TO GET TO OPERATING HOURS MENU
Press and buttons and release within two seconds, the display will show up
0
09.99
hrs/khrs
hrs/khrs
Press
Press
Press
Press
Press
Visualizes:
Inlet water temperature
Active alarms
OPERATING HOURS
Compressor 1 operating hours
Compressor 2 operating hours
Compressor 3 operating hours
Compressor 4 operating hours
Water pump operating hours
To move through the menu on this way
Press and buttons simultaneously and release within two seconds.
To move through the menu on this way
Press and buttons simultaneously during more than two seconds.
mode
on off
mode
on off
To move through the menu on this way , press:
To move through the menu on this way , press:
mode
on off
Press
mode
on off

14
E00 This señalization en not an alarm, indicates that unit is turn off from ON /OFF remote.
Compressor and fan thermal protection
alarm:
- Compressor and fan thermal protection
open
- Faulty power supply
E03
E01
E02
DISPLAY MENU
Visualizes:
Inlet water temperature
Active alarms
LEVEL 1
Probe status
ALARMS
SET POINT
Active alarms Codes
LEVEL 2
-----
MENU STRUCTURE
Press
Press
ALARM CODES
The unit self-protect through safety devices, when any of these safety devices detect an anomaly, shown
in the display in order to advice the installer.
The activation of an alarm brings about:
- The display of the alarm code beginning with the letter E and follows a number, if more than one alarm
will be activated, the alarm visualized would be the one with the lowest numerical value.- The blocking
of some or all the outputs, depending on the type of alarm.
VIS (Visualization) :Indicates the type of alarm shows on the display.
RE (Reset) : Type of reset: To enable the alarms:
AUT: AUTOMATIC RESET: Some alarms are automatically reset, when the cause is no longer present, they
disappear from the display.
MAN: MANUAL RESET: Pressing ON/OFF button, for more than 2 seconds.
If the alarm conditions have been removed, the instrument returns to the normal operation and the alarm relay is
de-energized. If on the other hand, the alarm conditions persist, then call for technical service.
Press the ON/OFF button until the alarm
disappeared, if alarm shows up again
check continuity and change the faulty
component
•Check refrigerant charge
•Check the refrigerant circuit is not
blocked
•Check connections and fusses
•Check power supply
MAN
VIS. RE
MAN
MAN
DESCRIPTION EFFECT ACTION
High pressostat alarm
This alarm may indicate the following
problems:
- High pressostat protection
- Compressor electrical protection
(only EAC 047 o 081)
- Indoor fan electrical protection
- Fuses of the fan burn out
Press the ON/OFF button, until the alarm
disappeared, if the alarm shows up again
check:
•Coil clean and no blocked.
• Water flow on the cooling cycle
•Check fuses of the fan
Low presostat alarm
This alarm may indicate the following
problems:
- Low amount of refrigerant
- Low water flow in cooling cycle
- Blocked coil in heating cycle
- Fuses of the fan burn out
After two automatic resets in one hour, it
comes to be a manual reset
When this alarm shows up repeteally,
and the alarm keeps on, make a electrical
reset and check:
•Coil clean and no blocked.
• Water flow on the cooling cycle
•Check fuses of the fan
•Check refrigerant charge.
Unit
stops
Compressor
1 stops
Compressor
1 stops
Press
mode
on off

15
ALARM CODES
E05
E06
E07
E11
E12
E13
E21
E22
Anti-freeze alarm
Indicates the outlet water temperature is
lower than +3ºC.
Outlet water probe alarm
Outlet water probe open or without
connecting.
Alarm of the refrigerant piping probe:
Refrigerant piping probe open or
without connecting
Second compressor and fan thermal
protection alarm:
- Compressor and fan thermal protection
open
- Faulty power supply
VIS. RE
MAN
AUTO
AUTO
AUTO
AUTO
MAN
MAN
MAN
High presostat alarm, circuit 2
This alarm may indicate the following
problems:
- High presostat protection
- Compressor electrical protection opens
- Indoor fan electrical protection opens
- Fuses of the fan burn out
Low presostat alarm, circuit 2
This alarm may indicate the following
problems:
- Low amount of refrigerant
- Low water flow in cooling cycle
- Blocked coil in heating cycle
- Fuses of the fan burn out
After two automatic resets in one hour, it
comes to be a manual reset
Press the ON/OFF button, until the alarm
disappear, if the alarm shows up again
check:
•Coil clean and no blocked.
• Water flow on the cooling cycle
•Check fuses of the fan
When this alarm shows up repeteally,
and the alarm keeps on, make a electrical
reset and check:
•Coil clean and no blocked.
• Water flow on the cooling cycle
•Check fuses of the fan
•Check refrigerant charge.
These protection are automatic reset, if
alarm shows up again check:
•Connection of outlet water temperature
probe (ST2), (see electrical diagram),
Check continuity and change the faulty
component.
Press the ON/OFF button until the
alarm disappeared, if alarm shows up
again
•Check the water filter
•Check water flow
•Check that the water pump is
connected to power supply of the unit.
High pressure/High temperature alarm.
Is activated when refrigerant piping probe
(St3) detect a temperature higher than 65ºC
and the high pressostat has not activated.
This alarm may activated the following
problems:
-Faulty high pressostat.
Press the ON/OFF" button , until the
alarm disappeared, if alarm shows up
again, check:
• Working of high pressostat.
• Coil clean and no blocked.
• Water flow on the cooling cycle
• Check fuses of the fan
• Check low pressostat working.
• Coil clean and no blocked.
• Check water flow on the cooling cycle
• Check fuses of the fan
• Check refrigerant charge.
DESCRIPTION EFFECT ACTION
These protection are automatic reset, if
alarm shows up again check:
•Connection of refrigerant piping probe
(ST2), (see electrical diagram), Check
continuity and change the faulty
component.
Low pressure/Low temperature alarm.
Is activated when refrigerant piping probe
(St3) detect a temperature lower than -30ºC
and the low pressostat has not activated.
This alarm may activated the following
problems:
-Faulty low pressostat.
Press the ON/OFF button until the alarm
disappeared, of alarm shows up again
check continuity and change the faulty
component
•Check refrigerant charge
•Check the refrigerant circuit is not
blocked
•Check connections and fusses
•Check power supply
Unit
stops
Unit
stops
Unit
stops
Unit
stops
Unit
stops
Compressor
2 stops
Compressor
2 stops
Compressor
2 stops

16
ALARM CODES
E40
E41
E45
E46
E23
E27
E31
E32
Water flow switch alarm
Indicates low water flow in the unit.
Inlet water probe alarm:
It may indicates:
- Inlet water probe opens or without
connecting.
Alarm of error configuration.
It may indicates that the terminal is broken
High inlet water temperature. Indicates:
Inlet water temperatures detects
temperatures higher than 90ºC, during
more than one second
Compressor and fan thermal protection alarm
circuit 2:
- Compressor or fan thermal protection open
- Faulty power supply
Alarm of the refrigerant piping probe,
for circuit 2
It may indicates:
Refrigerant piping probe open or
without connecting
AUTO
AUTO
AUTO
AUTO
VIS. RE
MAN
AUTO
AUTO
AUTO
Compressor
2 stops
•Check water circuit is not blocked.
•Check water filter
Check connection of refrigerant piping
probe (ST1), (see electrical diagram),
Check continuity and change the faulty
component.
This protections are automatic reset, if the
alarm shows up again, check the continuity
and change the faulty component.
This protections are automatic reset, if
the alarm shows up again,
Check connection of inlet water probe
(ST1), (see electrical diagram)
check the continuity and change the
faulty component
DESCRIPTION EFFECT ACTION
Press the ON/OFF button until the alarm
disappeared, if alarm shows up again
check continuity and change the faulty
component
•Check refrigerant charge
•Check the refrigerant circuit is not
blocked
•Check connections and fusses
•Check power supply
These protection are automatic reset, if
alarm shows up again check:
•Connection of refrigerant piping probe
(ST2), (see electrical diagram), Check
continuity and change the faulty
component.
High pressure/High temperature alarm.
Is activated when refrigerant piping probe
(St3) detect a temperature higher than 65ºC
and the high pressostat has not activated.
This alarm may activated the following
problems:
-Faulty high pressostat.
Press the ON/OFF" button , until the
alarm disappeared, if alarm shows up
again, check:
• Working of high pressostat.
• Coil clean and no blocked.
• Water flow on the cooling cycle
• Check fuses of the fan
• Check low pressostat working.
• Coil clean and no blocked.
• Check water flow on the cooling cycle
• Check fuses of the fan
• Check refrigerant charge.
Low pressure/Low temperature alarm.
Is activated when refrigerant piping probe
(St3) detect a temperature lower than -30ºC
and the low pressostat has not activated.
This alarm may activated the following
problems:
-Faulty low pressostat.
Unit
stops
Unit
stops
Unit
stops
Unit
stops
Unit
stops
Compressor
2 stops
Compressor
2 stops

17
DESCRIPTION OF THE DEFROST SYSTEM
The defrost process is activated during heating mode in heat pump units, when the outside temperature is low and
the outdoor coil could become frozen.
To melt the ice the defrost function will switch the unit to cooling operation for a short period.
During defrost mode the low pressure is at minimum level, consequently the pressostat is disabled in this mode.
The manufacturer uses default control settings which apply to most installations. The set parameters determine
the following:
INITIAL DEFROST TEMPERATURE
The defrost cycle begins when outdoor probe temperature is below -3ºC more than 1 minute.
END DEFROST CYCLE
The defrost cycle ends when:
For one circuit unit when outdoor probe temperature of the refrigerating pie reaches 25ºC
For two circuits unit when end defrost pressostat detected 24 bar.
DELAY BETWEEN TWO DEFROST REQUESTS
Time between two defrost cycles is calculated from the end of one to the beginning of next , and it is 30 minutes.
This defines the time during which the initial defrost temperature must be maintained. When this time has elapsed
the unit starts to defrost. If the initial defrost temperature drops before this time has elapsed, pausing is blocked,
and only starts to count when the temperature returns below a set value. This pausing prevents the unit from
carrying out continual defrost patterns.
MAXIMUM DEFROST DURATION
This defines the max. defrost period if the temperature has not exceeded a set limit.
This idling avoids excessive defrost modes 5 minutes is the maximum time defrost cycle will be on
DEFROST CYCLE SEQUENCE:
When a probe located in the condenser detects low temperatures (-3°C) during which the operating mode is
reversed, the compressor will turn off, then during 30 seconds the reverse of the four-way valve, and 30 seconds
later the compressor start. This mode ends when the outside exchanger probe detects the final defrost temperature
or exceeds a safety interval. At the end of the defrost mode the compressor stops, 30 seconds later reverse the
four-way valve and 30 seconds later, the compressor starts again in heating mode, generating more warm water
at a more efficiently due to the absence of frost.

FAN SPEED CONTROL
18
ON OFF
52
ON
It is management by a fan speed control plate located at the electrical box of the unit
The function of this fan speed control is allowing the unit to operate at very low outside temperatures from -10ºC
to 46ºC during cooling mode.
In this case, is a proportional fan speed control, which vary the fan voltage supplied to the fan.
SAFETY DEVICES
Fan speed control: Management of the fan speed.
FAN STAGES AMBIENT TEMPERATURE FAN RPM
Fan stops
Minimum fan speed
Fan regulation
Silent fan speed
Maximum fan speed
Ambient temperature below +5ºC
Ambient temperature between +5ºC and +20ºC
Ambient temperature over +35ºC
Ambient temperature between +20ºC and +30ºC
Ambient temperature between +30ºC and +35ºC
0
350
350 a 750
750
900
These units contains various safety devices, in order to avoid the water reaches low temperatures so it may cause
a damage to the system.
1.- Anti-freeze protection:
This protection is activated by the control of the unit.
It comes on when the outlet water temperature probe (ST2), located inside the water interchanger, measures +5ºC
and get's off when the outlet water temperature reaches to +6ºC again.
When the protection is activated occurs as follow:
If the unit is on STAND-BY as the operating mode: the water pump goes on, the same happen with electrical heater
of water interchanger and electrical heater of water tank (if included)
- If the unit is operating on cooling mode: Feed the electrical heater of water tank, the electrical heater of the
water interchanger, and activates the hot gas injection valve (if the unit incorporates this optionals)
- If the unit is operating on heating mode:
Feed the electrical heater of water tank and the electrical heater of the water interchanger (if the unit incorporates
this optionals)
2.- Anti-freeze alarm.
This alarm activates when the outlet water temperature probe (ST2) measures a value lower than +3ºC, as a
consequence the unit goes off. The alarm could be reset when outlet water temperature reaches +8 ºC.
3.- Compressor start temporize
In order to avoid the motor compressor reaches high temperatures, the control stabilizes that should lapse a
minimum time of 5 minutes between two start of the compressor, and the compressor have to be off at least 2
minutes (the maximum time of starters in one hour is 12)
4.- Crank case heater compressor.
Located around compressor, this protection is activated during the period, the compressor stops, so keep the
compressor oil temperature on adecuatted conditions, protecting from the refrigerant into the compressor oil
cabinet.
5.-Water pump start temporize.
When cool or heat have been selected as the unit's operating mode the water pum start, compressor start 4
minutes water, in order to the water circuit stabilizes.
DO NOT TURN OFF THE UNIT OFF, SO THIS PROTECTION CAN OPERATES
NO TURN OFF THE UNIT, DURING A LOW PERIOD OF TIME WITHOUT USING THE UNIT,
INSTEAD OF THIS SELECT STAND-BY AS THE UNIT'S OPERATING MODE, SO THE UNIT IS
PROTECTED BY THE ANTI-FREEZE SAFETY DEVICE.

CONTROLLER
E210 / E420
INSTALLATION-OPERATION
&
MAINTENANCE MANUAL
set
12
mode
on off
2
1
x 1000

COD: MIL28E-1201 01-2002
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