TemperZone Econex Pro OPA 970RLTB2FPDQ Maintenance and service guide

OPA 970RLTB2FPDQ(-Z) (Econex Pro) c/w UC8
Air Cooled Packaged Units - Reverse Cycle - R32
Installation & Maintenance
CONTENTS Page
1. General ................................................................1
2. Installation............................................................1
3. Refrigeration System......................................... 2
4. Wiring.................................................................. 2
5. Economiser..........................................................3
6. Start-Up Procedure........................................... 4
7. Operation............................................................ 5
8. Maintenance....................................................... 8
9. Troubleshooting.................................................. 8
10. Warranty............................................................ 9
Appendix I: Controls Set-up IP Address..............9
Appendix II: Master Controller - System Info......10
Appendix III : UC8 Protection Functions.............11
Appendix IV: Air Handling Performance.............13
1. GENERAL
Temperzone OPA Outdoor Air Cooled Packaged units.
Follow these instructions to ensure the optimum
performance, reliability and durability.
Units must be installed in accordance with all national and
regional regulations and bylaws. National Health and Safety
regulations must be followed to avoid personal injuries.
The appropriate local permits must be acquired and
adhered to.
Local regulations on maximum boundary noise need to
be considered when positioning the unit.
The accompanying ‘R32 Handling Ducted Packaged Units’
pamphlet forms part of these Installation & Maintenance
instructions.
!WARNING
These units use R32 refrigerant (Class A2L) which is
mildly ammable.
The system shall be installed, operated and stored in a well
ventilated space. If the refrigerant gas comes into contact
with re, a poisonous gas may occur. Be aware that R32
does not contain an odour.
If indoors, the appliance shall be stored in a room away from
continuously operating sources known to cause ignition of
R32 refrigerant (for example an operating gas appliance or
operating electric heater)
2. INSTALLATION
2.1 Clearances & Service Access
Refer to Specication Sheet supplied for minimum
clearances. If multiple units are to be placed side-by-
side then allow at least 2m between coil faces.
Filter slides are tted within the unit. Access to the lter
access door should be considered when designing
return and supply air ductwork.
2.2 Mounting
The unit should be fastened to a rm at horizontal
base using the holes supplied in the mounting
channels. When the unit is being installed on a roof it is
recommended that the unit is installed on a substantial
structure with vibration isolating pads or mounts. If
placed on the ground or concrete pad, use rubber pads
or mounts to give 20mm min. ground clearance.
Flexible duct connections are recommended between
the supply and return ducts and the unit.
Unit is shipped with plastic wedges installed under the
compressors. Ensure these wedges are removed from
the compressor feet prior to starting the unit
(not required for operation).
2.3 Condensate Drains
The condensate drains should be ‘U’ trapped outside
the unit. The traps should have a vertical height of at
least 100 mm. The drain lines should have a slope of at
least 1 in 50 and must not be piped to a level above the
unit drain pipe.
OPEN
DRAIN
MINIMUM
SLOPE
20 mm PER m
(1 IN 50)
100 mm
MINIMUM
200 mm
APPROX.
'U' TRAP
100 mm
APPROX.
VENT PIPE
FOR LONG
CONDENSATE
DRAIN RUNS
003-000-286 01/23
GENERAL
INSTALLATION

- 2 -
WIRING
4. WIRING
4.1 Electrical Requirements
Electrical work must be done by a qualied electrician
and meet standard AS/NZS 3000.
DANGER! LIVE ELECTRICAL CONNECTIONS. ISOLATE MAINS
POWER BEFORE WORKING ON UNIT. ONLY QUALIFIED PERSONS
WHO ARE COMPETENTLY TRAINED SHOULD PERFORM SERVICE
AND MAINTENANCE TASKS.
The unit must be wired directly from a distribution
board using an appropriately sized circuit breaker. The
termination point for the mains cable is in the electrical
compartment. An isolating switch is required, near but
not on the unit.
4.2 Controls Wiring
Before wiring, the method of control should be
established from the following list. Follow specic
instructions in the following sections. Section 4.3 is
important to all sections.
Control method Section
Sensors and Inputs 4.3
BMS – BACnet Interface 4.4
BMS – Modbus Interface 4.5
Standalone 4.5
4.3 Sensors & Inputs
See table below for sensors and inputs required for each
control method.
Carel c.pCO
connections
Factory
Fitted
BMS
Bacnet/
Modbus
BMS -Low
Level
Controller
Stand
alone
Sensor Pin Signal
Room Temp. U1 0-10VDC Note 1 Note 3 × √
Room RH% U2 0-10VDC Note 1 Note 3 × √
ID Fan Speed
Req
U3 0-10VDC × Note 2
RA Temp. U4 0-10VDC √ √ √ √
RA RH% U5 0-10VDC √Note 4
SA Temp. U6 0-10VDC √ √ √ √
SA RH% U7 0-10VDC √ √ √ √
The following inputs relate only when using external low level control:
Enable ID4 24VAC × × √×
Occupancy ID6 24VAC × × √×
Fault NO7 Relay × × √×
Notes:
1. Factorysuppliedloose,tasrequiredincontrolled
space.
2.Optionallyprovide0-10VDCcontrolofindoorfan
speed,willbeoverriddenifwrittentoBACnetor
Modbusindoorfanspeedregister.Canalsobeset
usingaCarelpGD.
3.RoomtemperatureandRH%canbewrittenvia
BACnetorModbusandwilltakepriorityoversensor
reading,inthiscasesensorsarenotrequiredtobe
tted.
4.RAsensorsonlyrequiredforEconomiseroption.IfRA
tobeusedtocontrolthespacethenwireRAsensors
intotheRoomtemperatureandRoomRH%inputs.
4.4 BMS – BACnet Interface
1. Install ethernet cat 5 STP shielded cable between
the port shown in the below diagram of the Carel
c.pCO controller and the network switch of the
BMS. The default IP address of the controller is
192.168.1.10; refer Controls Setup (p.9) for details on
how to change.
2. Temperature and humidity sensors can be
connected directly to the Carel c.pCO controller (see
specication sheet for wiring diagram). Alternately
the space temperature and humidity can be written
by the BMS to BACnet objects which will take
priority over any sensors that are connected.
SingleunittoBMS:
Multipleunitsusinganetworkswitch:
3. REFRIGERATION SYSTEM
3.1 General
Each OPA 970 Econex Pro have two independent
refrigeration systems and two inverter compressor
to provide the exibility and economy of four stage
operation, i.e. utilising one to four systems as conditions
vary, plus the advantage of staggered starting, all
stages being variable for improved control and system
efciency.
Each refrigeration system has been charged with R32
refrigerant; refer Specications document for amount.
3.2 Compressors
The compressors are inverter scroll type. The
compressor lubricant is POE-46 (NXG5020 or
equivalent). Note, this oil absorbs moisture quickly if
exposed to open air.
REFRIG. SYS.

- 3 -
WIRING
BMS
RS GND
RSA
RSB
18
ENG
c.pCO sistema +0300057EN rel. 1.1 - 13.04.2015
J3 Disp
+Vterm
LH
J4 FBus J5 CAN J3 Disp J4 FBus J6 BMS
+Vterm
J3 Disp J4 FBus J6 BMS
+Vterm
G
G0
G
G0
G
G0
24 Vac
LN
230 Vac
24 Vac
LN
J25 BMS2 J26 FBus2
J11 pLAN
c.pCO
G
G0
J25 BMS2 J26 FBus2
J11 pLAN
c.pCO
G
G0
J25 BMS2J26 FBus2
J11 pLAN
c.pCO
G
G0
Fig. 4.e
The procedure for earthing the shield is described in the corresponding
paragraph.
Case 2: multiple boards connected to a Master/Slave network powered
by diff erent transformers (with G0 not earthed); this is a typical application
of multiple boards inside diff erent electrical panels. If the network is more
than 100 m long, the 120 Ω, ¼ W terminating resistor is required.
J3 Disp
+Vterm
LH
J4 FBus J5 CAN J3 Disp J4 FBus J6 BMS
+Vterm
J3 Disp J4 FBus J6 BMS
+Vterm
G
G0
G
G0
G
G0
230 Vac
24 Vac
LN
230 Vac
24 Vac
LN
230 Vac
24 Vac
LN
R = 120 Ω R = 120 Ω
J25 BMS2 J26 FBus2
J11 pLAN
c.pCO
G
G0
J25 BMS2 J26 FBus2
J11 pLAN
c.pCO
G
G0
J25 BMS2 J26 FBus2
J11 pLAN
c.pCO
G
G0
230 Vac
24 Vac
LN
230 Vac
24 Vac
LN
230 Vac
24 Vac
LN
R = 120 Ω R = 120 Ω
Fig. 4.f
Important: the earth connection (if any) should be made only on
one point of the earth line (same earthing terminal for all controllers).
The procedure for earthing the shield is described in the corresponding
paragraph.
Optically-isolated serial port
This is the case of serial ONE - BMS1, serial TWO - Fieldbus 1 and the built-
in ports serials THREE and FOUR on optically-isolated models. Regardless
of the type of power supply or earthing, use a 3-wire shielded cable
connected as shown in the fi gure. If the network is more than 100 m
long, the terminating resistor is required.
J25 BMS2 J26 FBus2
J11 pLAN
c.pCO
G
G0
J25 BMS2 J26 FBus2
J11 pLAN
c.pCO
G
G0
J25 BMS2 J26 FBus2
J11 pLAN
c.pCO
G
G0
R = 120 Ω R = 120 Ω
Power
supply
Fig. 4.g
The procedure for earthing the shield is described in the corresponding
paragraph.
Procedure for earthing the shield
The shield of the serial cable is earthed diff erently according to the
length, as shown in the fi gure (where A=FBus terminal, B=BMS terminal).
Case 1: distance between controllers less than 0.3 m: earth only one end
of the cable.
L < 300 mm
L < 300 mm
AB B
Fig. 4.h
Case 2: distance between controllers greater than 0.3 m: two possibilities.
- earth one end with a bridge between the shields
L >300 mm
L > 300 mm
AB B
Fig. 4.i
- earth both ends of the cable (no bridge between shields).
L >300 mm
L > 300 mm
AB B
Fig. 4.j
5. ECONOMISER OPTION
The Economiser package that is factory tted consists
of two opposed blade dampers, one for the fresh air
and the other for the return air. They come complete
with individual damper motors controlled using a 0–10V
dc signal. The package also includes a weatherhood
assembly that is usually supplied as a separate item
for tting on site. It is important that the installation
instructions for the tting of the weatherhood are
followed otherwise it is possible some water ingress
from rain could occur.
If the outdoor temperature as well as the enthalpy is
below that of the return air, the fresh air damper can be
opened and the return air damper closed to provide the
rst stage of cooling.
The air damper’s minimum and maximum openings
can be adjusted using the Master Controller (c.PCO)
Menu/Settings/Damper Cong. Each of the dampers
can have settings for use in both the occupied and
unoccupied modes. The settings for opening based
on an optional CO2air quality sensor can also be
adjusted. Many installations may require a minimum
fresh air introduction of 10–15% (refer local Building
Code regulations) and the stop may be set on site to
facilitate this. Ensure the air ow entering the unit is
equal between full return air and full Economiser by
adjusting the damper stops on both Return and Fresh air
dampers.
ECONOMISER
4.5 BMS – Modbus Connection
Connect to supplied terminals in electrical box; refer
Specications document for wiring detail, sheet 2 grid
reference D0, reproduced below.
Figure 1: RS485 terminal block in electrical box
Figure 2: Carel recommendations for shield grounding
4.6 Stand Alone
Option 1:
1. Install optional Carel pGD1 remote display (Item no.
201-000-379) inside building, connection to Carel
c.pCO master controller J10 port. Cable RJ11.
2. Connect Room temperature and humidity sensor
directly to Carel c.pCO master controller. See
Specication sheet for wiring schematic/sheet 2 for
wiring details of Room temperature input) and Room
RH%.
Option 2:
In absence of a Carel remote pGD1 the unit can be
controlled using the on-board Carel c.pCO master
controller with its included digital display.
4.7 Economiser Wiring
See Specications document for wiring schematic/
sheet 1, lower left corner.

- 4 -
START UP PROCEDURE
6. START-UP PROCEDURE
6.1 Before starting the compressors
1. Before working on the unit isolate mains power.
2. Remove the shipping wedges from beneath each
compressor. Check that each compressor is
securely mounted.
3. Check oil level as per label attached to each
compressor.
4. Check the mains power and controls wiring are
correct.
5. Check tightness of all electrical connections.
6. Check the air lters have been correctly installed.
7. Check that all indoor fan motors can freely rotate.
8. Check the supply voltage between each phase and
neutral.
9. Check air diffusers and ductwork are open.
10. Apply mains power to the unit by closing the mains
isolating switch.
11. Before starting the compressors a four hour delay
period is required to allow the crankcase heaters to
drive any liquid refrigerant out of the compressor oil.
Mains power must be switched on during this four
hour delay period.
6.2 Master Controller Display (Carelc.pCO)
Button Function
Alarm System Alarm indication and Reset
Menu Go to Main menu
Esc Return to previous page or Exit menu
Main Menu:
6.3 Commissioning
After the four hour delay period has expired (see step
11 in section 6.1) complete the following procedure. You
can use the Commissioning Sheet (supplied with the
unit) to help you.
1. From the initial screen of the Master Controller press
Menu button to bring up the Main menu.
2. Scroll down and select ‘D. Service’.
Enter password ‘2100’.
3. Scroll down and select ‘Manual Control’.
4. Scroll to ‘Manual Airow’. First enter airow
requirement in litres/second then select ‘Yes’ under
enable to start indoor fan operation. (refer Note
below)
5. Measure air ows from duct work to verify air ows,
record current draw on each fan and then disable
‘Manual Airow’.
6. Scroll to sub menu ‘B. Settings’ &select ‘Fan Cong’.
Change fan mode to either ‘Airow’, ‘Fixed Speed’ or
‘0-10VDC’.
7. Change airow setpoint on following pages to match
veried airows. If using xed speed, set speed
in % and cross check current draw against airow
measurements. Otherwise set airow in litres/
second as per measured values.
8. Scroll back to ‘D. Service’ menu and manual ‘control
menu’.
9. Navigate to ‘Manual Unit Capacity’ and select
capacity requirement. 100% = all compressor
stages on. NOTE: 1. This does not correspond to
compressor speed. 2. Unit will need to be turned on
by keypad to allow the capacity control to function.
10. Allow compressors to run for a short duration while
checking for any unusual noises or vibrations.
11. Measure the current draw on each phase to the
compressor motor and to each fan motor. Check the
readings against the specied values in the wiring
diagram or Specication sheet.
12. Check each refrigeration system’s information, from
the Main menu select ‘Information’, then ‘UC8’ (refer
Appendix I for more detail). Also check Information/
Power usage.
13. Once testing is complete disable ‘Manual Unit
Capacity’.
14. Touch up any unit paintwork damage incurred in
transit to prevent corrosion.
Note:
Setting the indoor fan speed too low can bring risk of
frost forming on the indoor coil with potential nuisance
frost protection trips on cooling, possibly even unit lock-
out, and/or HP trips on heating.
Setting the indoor fan speed too high can bring a risk of
blowing moisture off the ns of the indoor coil and into
the supply air duct. Water could then start leaking from
the supply air grilles and corrosion of ducting may occur.
Setting the indoor fan speed too high can also bring a
risk of ‘over-condensing’ (when the unit is heating) which
in turn could cause the unit to perform more outdoor coil
de-ice cycles than necessary.
Outdoor fans do not necessarily start rotating
immediately after the compressor is started. The fans
may run-on for a short period after the compressor
stops.
The indoor fan will reduce speed if in heating mode and
the condensing temperature is too low to automatically
allow the compressors to warm up.

- 5 -
7. OPERATION
7.1 BMS – BACnet
Congure the IP address as required, see Appendix for details.
Once connected to the BMS server, to start the unit via BACnet if the room temperature and RH% sensors are connected
directly to the controller and the indoor fan speed has been set using the PGD then all that needs to be done is to write to
the below BACnet objects.
Type Object
Instance
Object Name Read/Write Units Default Range Description
BinaryValue 1BMS.Unit_OnOff RW Bool 0 0 to 1 Enable Unit to run
AnalogValue 30 BN.SP_Cooling RW °C 22 5 to 35 Cooling SP, must be > heat SP
AnalogValue 31 BN.SP_Heating RW °C 20 5 to 35 Heat SP, must be < cool SP
If the Room temperature and RH% are measured by the BMS then the below objects also need to be written.
Type Object
Instance
Object Name Read/Write Units Default Range Description
AnalogValue 36 BN.0V_RoomAirT RW °C -5-35 Room temperature written by
BMS
AnalogValue 37 BN.0V_RoomRH RW RH% -0-100 Room RH% written by BMS.
BinaryValue 4BMS.RoomT_RH _
ORide
RW Bool 0Bool Use BACnet Room temp and
RH (BMS_RoomT and BMS_
Room_RH) for control
To adjust the air ow via BACnet the following object need to be written.
Type Object
Instance
Object Name Read/Write Units Default Range Description
AnalogValue 44 BN.SP_Air_Flow_
Setpoint
RW l/s 10000 0-13750 Air ow l/s setpoint
BACnet license pre-installed in temperzone factory.
7.2 BMS Modbus
For information regarding using Modbus commands, please ask temperzone.
7.3 Stand Alone
Adjusting the set points:
1. Press Program button .to bring up the Main Menu
2. Select ‘B. Settings’, Login information will then be
needed. Default password is ‘2100’, this can be
changed by user.
3. Select ‘Setpoint’
OPERATION

- 6 -
OPERATION
4. Press enter then use Up/Down keys to adjust the
value or press enter key to move to the next value.
The page shown is for the occupied settings. To
change press the enter key to move between each
setting, then use the up and down keys to change
the value, once done press enter until it ashes
in the top right corner. Now press the down key to
move to the next page, or esc key to go back to the
menu.
5. The second page (2) allows the Unoccupied settings
to be changed.
6. Scroll down to the next page (3).
The deadbands can be adjusted, these control the
how far past the setpoint before the mode is turned
on or off.
7. Scroll down to the next page (4).
To prevent moisture formation on duct work when
the unit is running in cooling mode, if the optional
reheat coil is installed this function will control the
supply air to be above the dewpoint temperature of
the room.
8. Scroll down to the next page (5).
If the optional reheat coils are tted then a supply
air temperature can be set when operating in dehum
mode when the room temperature is within setpoint
and the RH is too high.
9. Scroll down to the next page (6).
The main mode of the unit can be set to auto or be
limited to heating only or cooling only to suit the
application.
10. Scroll down to the next page (7).
Quick access to a daily schedule to set the hours
of Night Mode; Night mode reduces the outdoor fan
use to provide lower noise levels during operation.
11. Scroll down to the next page (8).
Quick access to a daily schedule to set the
Unoccupied hours.

- 7 -
12. Menu/Settings/Fan Cong./Fan Control Method (1).
For setting of the fan control method.
Options include a xed speed, or constant air ow
13. Menu/Settings/Fan Cong./Constant Air Flow (2).
Scroll down to the next page. A pressure sensor is
factory tted to the indoor fans allowing the air ow
to be automatically controlled. Set the ow in l/s.
14 Menu/Settings/Damper Cong:
If economiser dampers tted use these pages to
adjust the open and closed positions.
15. Menu/Settings/Optimization
Quick settings for how the unit operates and controls
the coil temperatures during each of the comfort
modes. Chose between Standard, high efciency
and high performance. A manual mode is also
provided that allows for each setting to be tailored.
To power on the unit from the controller follow the below instructions:
1. From the main screen, use the up and down keys to
select the ON/Off symbol as shown in the screen in
the lower righthand corner. Press enter.
2. At the next screen use the Up/Down Key to turn the
unit On then press enter to conrm.
OPERATION

- 8 -
TROUBLESHOOTING
9. TROUBLESHOOTING
9.1 Room temperature varies signicantly from its
setting
• Unit may have been incorrectly sized for the building.
• Drafts from wrongly placed supply air diffusers or
from the back of the wall plaque could be affecting the
temperature sensor built into the wall plaque.
• Poor air circulation in the room can cause incorrect
temperature readings.
9.2 Air conditioner does not seem to deliver the heating
when most needed
• Heating capacity at design conditions may be
incorrect. As the outside temperature falls, heat losses
through the walls, oor and ceiling increase.
• Check the unit’s brochure for information on the
minimum/ maximum operating temperatures.
9.3 When heating, units have de-icing cycles built in to
remove ice on the outdoor coil.
• This usually means reversing the cycle for a few
minutes during which time there is no heating and in
fact a little cooling can occur.
9.4 In a new building, why does it take some days
before the air conditioning heat pump unit seems to
work properly
• Many new buildings, especially a commercial buildings,
have a large amount of concrete and other structural
materials that are generally cold and full of moisture.
This is most evident in the winter when trying to heat
the building from scratch.
9.5 Unit is leaking water
• Check the drain trap/vent/slope.
• Water carry-over: Reduce the maximum fan speed.
9.6 Air conditioner runs excessively – the temperature
remains too hot in summer or too cold in winter.
• Windows or doors may be opened to non conditioned
areas.
• Keep doors to unconditioned areas closed.
• Leaves, papers or other items blocking air ow over the
outdoor unit coil.
• Location of wall controller or remote temperature
sensor is incorrect.
• Check for leaks in supply or return air ductwork.
9.7 Unit displays an error code:
• Refer to UC8 Controller label on the unit for
operation & fault diagnostics information or visit
www.temperzone.biz; model search ‘UC8 Controller’.
• Press the Alarm button on the pGD to list the most
recent faults. Refer OPA 1470/1710/2100 Controller
Manual for an explanation.
MAINTENANCE
8. MAINTENANCE
WARNING! HAZARDOUS VOLTAGE. ENSURE ALL POWER SUPPLIES ARE
ISOLATED BEFORE PERFORMING MAINTENANCE. FAILURE TO ISOLATE
POWER CAN LEAD TO SERIOUS INJURY.
8.1 Monthly
1. Check air lters and vacuum, wash clean or replace
as necessary.
2. Check condensate drain for free drainage.
3. Check compressor compartment for oil stains
indicating refrigerant leaks.
!WARNING
Under no circumstances shall potential sources of
ignition be used in the searching for or detection of
refrigerant leaks. If a leak is suspected, all naked
ames shall be removed/extinguished.
If a leakage of refrigerant is found which requires
brazing, all of the refrigerant shall be recovered from
the system.
4. Check system operating pressures via the Carel
c.PCO controller (refer Appendix I).
8.2 Every Three Months
1. Check operation of Economiser dampers.
2 Check for obstruction of Economiser dampers.
8.3 Six Monthly
1. Check the tightness of electrical connections.
2. Check for signs of corrosion on electrical connections
in high salt atmospheres; replace where necessary.
3. Check the tightness of all fan motor mountings
4. Check system operating pressures via the Carel
c.PCO controller (refer Appendix I).
5. Check condensate drain for free drainage.
8.4Yearly
1. Check all refrigerant piping for chang and vibration.
2. Check air supply at all diffusers
3. Check for excessive noise and vibration and correct
as necessary.
4. Check for insulation and duct damage and repair
as necessary.
5. Check sensor values with calibration tool.
Adjust +/- offset via Settings/Sensor routing MENU.
6. Check system operating pressures via the Carel
c.PCO controller (refer Appendix I).
7. Remove lint and dust accumulation from outdoor
coil ns with soft brush or low pressure water spray.
In corrosive environments, the checking and cleaning
frequency should be increased.
8. Touch up any paintwork damage to prevent corrosion.

- 9 -
APPENDIX I
CONTROLS SET-UP : IP ADDRESS
The default IP address of the controller is ‘192.168.1.10’. To change follow the below instructions.
1. Press Alarm and Enter together for 3 seconds to
access the system menu. Scroll to ‘Settings’ and press
Enter button
2. Scroll to ‘TCP/IP settings’ and press Enter button
3. Select Settings:
Enable: Static
IP: Enter an address in the same subnet set on the
PC, for example:
IP: 192.168.1.1
MASK: 255.255.255.0
GW: Enter as required, must start with rst 3 parts
identical to IP as set by mask.
DNS: Enter as required
Select Update conguration --> Yes
APPENDIX I – CONTROL SET-UP : IP ADDRESS
10. WARRANTY
Please refer to the separate warranty document supplied with the unit, or visit www.temperzone.biz for details.
Australia: New Zealand:
[e-mail] [e-mail]
[e-mail] Telephone: 0800 TZWARRANTY (899 2777)
Telephone: [phone]
WARRANTY

- 10 -
APPENDIX II
MASTER CONTROLLER : SYSTEM INFORMATION
1. Press Program button .to bring up the Main Menu
Select ‘A. Information’.
2. Select ‘UC8’.
There are two separate UC8 controllers in an
OPA 970 – one per refrigeration system.
3. UC8 Info.screens. These show the UC8 controller
variables such as suction superheat, expansion
valve position, etc. Refer table below for key to
abbreviations:
Abbrev.. Description
OAT Ambient Temp. °C
DeICe De-ice sensor temp. °C
SLT Suction line temp. °C
EvapT Evaporation temp. °C
DLT Discharge line temp. °C
CondT Condenser temp. °C
SSH Suction superheat K
DSH Discharge superheat K
ODF Outdoor fan speed
IDF Indoor fan speed
HP Discharge pressure kPa
LP Suction pressure kPa
EXV1 Expansion valve A %
EXV2 Expansion valve B %
OCT Outdoor Coil Temp. °C
ICT Indoor Coil Temp. °C
4. Scroll down to see UC8 systems 2 to 4.
5. Press Program button to return to the Main Menu
APPENDIX II – MASTER CONTROLLER SYSTEM INFORMATION