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Troubleshooting Guide - Advance Split Ducted Unit
Doc. 9590-2015-03 Ver. 3 221111
Troubleshooting Guide
Advance Split Ducted Unit
Ambient/Outdoor Coil/
Indoor Coil/Suction
Temperature Sensor
Discharge Line
Temperature Sensor
Temp
(°C)
Resistance
(KΩ)
Resistance
(KΩ)
118
0.6
4.3
119
0.6
4.2
120
0.6
4.1
04.10. Pressure-Voltage Table For Pressure Transducers
LR7-1 / LC7-2
Outdoor
Unit
CPU
Category
Function / Fault
-
Boot
Status
Unit is starting up
-
oFF
Status
Unit Off or Unit Turning Off (flashing)
COOL
CooL
Status
Unit Cooling Mode or Start Cooling (flashing)
HEAT
HEAt
Status
Unit Heating Mode or Start Heating (flashing)
Defrost Status
dEF
Status
Heating Mode - Defrost
Defrost Status
dEF3
Status
3 min to Defrost
Defrost Status
dEF2
Status
2 min to Defrost
Defrost Status
dEF1
Status
1 min to Defrost
HEAT
HEAt
Status
Heating Mode - Indoor coil pre-heat after defrost
-
oiLr
Status
Oil Return Operation
Energy Saving
dr-1
Status
Demand Response Management 1
Energy Saving
dr-2
Status
Demand Response Management 2
Energy Saving
dr-3
Status
Demand Response Management 3
-
ohP
Status
Unit derating - Overheat Protection Mode
-
dtP
Status
Unit derating - Discharge Temperature Protection Mode
-
cPP
Status
Unit derating - Condenser Pressure Protection Mode
-
hSP
Status
Unit derating - High Suction Pressure Protection Mode
COOL & LOW blink 30s
Cool
Error
Anti Freeze Protection Mode
NOTE
When unit is powered up, “boot” will show in 7 segment display of outdoor board for 30 seconds, followed by normal CPU status
codes.
