8 Troubleshooting
260
SMGB0077 rev.0 - 01/2013
8.5 Outdoor and indoor alarm codes
Code
number
Category Abnormality Cause
01 Indoor unit Activation of the safety device
Failure of fan motor, drain discharge, PCB, relay, oat
switch activated
02 Outdoor unit Activation of the safety device
Failure of fan motor, drain discharge, PCB, relay, oat
switch activated
03
Transmission
Abnormal transmission between outdoor
and indoor units
Incorrect wiring, failure of PCB, tripping of fuse, power
supply OFF
04
Abnormal transmission between inverter
PCB (DIP-IPM) and outdoor unit PCB
(PCB1)
Abnormal transmission between PCB
05 Power supply
Abnormal operation of picking up phase
signal
Main power supply phase is reversely connected or one
phase is not connected.
06 Voltage
Excessively low voltage or excessively high
voltage for the inverter
Incorrect wiring or insufîš¿cient capacity of power supply
wiring
07
Cycle
Decrease in discharge gas superheat
Discharge gas superheat less than 10 degrees is maintai-
ned for 30 minutes.
08
Excessively high discharge gas temperature
at the top of compressor
Temperature of top compressor: Td
Td > 132°C over 10 minutes, or Td >140°C over 5 minutes
11
Sensor on indoor
unit
Air inlet thermistor
Failure of thermistor, sensor, connection.
12 Air outlet thermistor
13 Freeze protection thermistor
14 Gas piping thermistor
16
Sensor on indoor
unit
Remote thermistor Failure of thermistor
17 Thermistor of RCS Failure of thermistor
19
Activation of the protection device for the
indoor fan motor
Failure of fan motor
20
Sensor on
outdoor unit
Compressor thermistor Failure of thermistor, sensor, connection.
21 High pressure sensor
Incorrect wiring, disconnected wiring, broken cable, short
circuit.
22
Thermistor for outdoor ambient temperature
(THM7)
Failure of thermistor, sensor, connection.
23
Thermistor for discharge gas temperature
(THM9)
Incorrect wiring, disconnected wiring, broken cable, short
circuit.
24
Thermistor for evaporating temperature
(THM8)
Failure of thermistor, sensor, connection.
29 Low pressure sensor
Incorrect wiring, disconnected wiring, broken cable, short
circuit.
31
System
Incorrect capacity setting or combined capa-
city between outdoor and indoor units
Incorrect setting of the capacity code.
35 Incorrect indoor unit number setting
Duplication of indoor unit number , number of indoor units
over speciîš¿cations.
36 Incorrect indoor unit combination R22 indoor unit
38
Abnormality of picking up circuit for protec-
tion (Outdoor unit)
Failure of indoor unit PCB, incorrect wiring, connection to
PCB in indoor unit.
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