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TROUBLESHOOTING
17. TROUBLESHOOTING
Alarm Code Indication of Remote Control Switch:
Abnormal Indoor
Abnormal Ref.
Unit No.
Cycle No.
COOL MED
ADDS. RN
A/C
ALARM
Code No.
Item involved
Indoor unit
01
Unit Outdoor
02
03
Transmission
04
05
Voltage drop
06
07
Cycle
08
11
12
Sensor on the
13
Indoor Unit
14
19
20
22
24
Sensor on
Outdoor Unit
31
35
38
PMML138A_R1-eng-fre.indb 50
Alarm Code
Model Code
Indicated for
a second
COOL MED
alternately
A/C
Contents of abnormality
Tripping of module protective device
Tripping of protective device
Abnormality between Indoor (or Outdoor) and
Outdoor (or Indoor)
Abnormal operation between the inverter and the
control PCB
Abnormality of Power Source Wiring
Voltage Drop by Excessively Low or High
Voltage to Outdoor Unit
Decrease in Discharge Gas Superheat
Increase in Discharge Gas Temperature.
Control PCB
Heater situated in THM2
Freeze protection thermistor
Thermistor for Gas Piping
PCB 2 Fail report
Thermistor for compressor
Outdoor Air Thermistor
Evaporating thermistor
Incorrect setting of outdoor and indoor unit
Incorrect setting of Indoor Unit No.
Abnormality of Protective Circuit in Outdoor Unit
Connected No. of
Alarm Code
Indoor Units
ADDS. RN
ALARM
Activation of the flow controller, the low water level pressure switch.
Activation of the PSH, Locked Motor
Incorrect wiring, Failure of the PCB (indoor or outdoor). Blown fuse.
Power supply (module or OU) is OFF.
Failure in Transmission between PCBs (for Inverter)
Reverse Phase Incorrect Wiring.
Voltage Drop of Power Supply, Incorrect Wiring or insufficient
Capacity of Power Supply Wiring.
Excessive Refrigerant Charge, Expansion Valve Open Lock.
Insufficient Refrigerant. Ref. Leakage, Clogging or Expansion Valve
Close Lock.
Check jumper into CN14 (PCB 1)
Failure of Thermistor, control card, connection.
Crank the controller
Check pump operation.
Check leds in PCB2
Failure of a Thermistor, a sensor, a Connection.
Incorrect Setting of Capacity Code
Duplication of the Indoor Unit number.
Faulty PCB for outdoor unit. Incorrect Wiring Connection to PCB in
Indoor Unit.
PMML0138A-rev.1 - 11/2009
Model Code
Indication
Model
Heat-Pump
Inverter
Multi (Set-Free)
Cooling Only
Others
Twin, Triple and Quad
Leading cause
50
19/11/2009 14:46:11
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