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Troubleshooting
Code
Category
No.
01
Indoor Unit
Tripping of Protection Device
02
Outdoor Unit
Tripping of Protection Device
Abnormality between Indoor (or Outdoor) and
03
Outdoor (or Indoor)
Transmission
04
Abnormality between Inverter and Control PCB
05
Power Supply
Abnormality power supply
Voltage Drop by Excessively Low or High Volt-
06
Voltage Drop
age to Outdoor Unit
07
Decrease in Discharge Gas Superheat
Cycle
08
Increase in Discharge Gas Temperature
11
Inlet Air Thermistor
12
Outlet Air Thermistor
Sensor on
13
Freeze Protection Thermistor
Indoor Unit
14
Gas Piping Thermistor
19
Tripping of Protection Device for Fan Motor
20
Compressor Thermistor
21
High Pressure Sensor
Sensor on
Outdoor Unit
22
Out+door Air Thermistor
24
Evaporating Thermistor
31
Incorrect Setting of Outdoor and Indoor Unit
35
Incorrect Setting in Indoor Unit No.
System
38
Abnormality of Protective Circuit in Outdoor Unit
Activation of High Pressure Increase Protection
45
Device
Pressure
Activation of Low Pressure Decrease Protection
47
Device
48
Activation of overload protection
51
Abnormality of Current Sensor for Inverter
53
Protection Activation of Transistor Module
Inverter
54
Inverter Fin Temperature Increase
55
Inverter Module Abnormality
57
Outdoor Fan
Fan Motor Abnormality
Indoor unit No.
Incorrect address No. Setting or refrigerant
b1
setting
cycle
EE
Compressor
Compressor protection alarm
45
PMML0251A rev.2 - 02/2013
Content of Abnormality
Leading Cause
Failure of Fan Motor, Drain Discharge, PCB, Relay, Float Switch
Activated
Activation of PSH, Locked Motor
Incorrect Wiring, Failure of PCB, Tripping of Fuse, Power Supply
OFF
Failure in Transmission between PCBs for Inverter
Abnormal wave form of power supply.
Voltage Drop of Power Supply. Incorrect Wiring or insufficient Capac-
ity of Power Supply Wiring
Excessive Refrigerant Charge, Expansion Valve Open Lock
Insufficient Refrigerant, Ref. Leakage, Clogging or Expansion Valve
Close Lock
Failure of Thermistor, Sensor, Connection.
Failure of Fan Motor
Failure of Thermistor, Sensor, Connection
(Incorrect Wiring, disconnecting wiring, breaking wire, short circuit)
Incorrect Setting of Capacity Code.
Duplication of Indoor Unit number, Nº of Indoor unit over specifica-
tions.
Failure of Indoor Unit PCB. Incorrect wiring. Connection to PCB in
Indoor Unit.
Overload Operation (Clogging, Short-Pass), Pipe Clogging, Exces-
sive Refrigerant, Inert Gas Mixing
Stoppage by Excessively Decrease of evaporating Temperature
(Te < -35ºC) is activated 3 times in one hour, Locked Motor in Heat-
ing Operation.
Failure of IPM or PCB2, heat exchanger clogged, locked compres-
sor, EVI/EVO failure or overcharge.
Failure of Control PCB, Inverter Module.
Transistor Module Abnormality.
Failure of Compressor, clogging of Heat Exchanger.
Abnormal Inverter Fin Thermistor.
Clogging of Heat Exchanger
Abnormal Outdoor Fan
Failure of Inverter Module.
Disconnected wire of Incorrect wiring between Control PCB and
Inverter PCB.
Incorrect Wiring or Fan Motor Abnormality
Over 64 indoor units setting by No. or indoor unit address.
Failure of compressor.
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