11.2 main alarm codes
code
category
content of abnormality
01
Indoor unit
Activation of protection device (float switch)
02
Outdoor unit
Activation of protection device (high pressure cut)
03
Transmission
Abnormality between indoor and outdoor
04
Abnormality between Inverter PCB and outdoor PCB
05
Supply phase
Abnormality power source phases
06
Voltage
Abnormality of voltage drop in outdoor unit
07
cycle
Decrease in discharge gas superheat
08
Excessively high discharge gas temperature at top of compressor chamber
09
Outdoor unit
Activation of protection device for outdoor fan
11
Sensor on indoor unit
Inlet air thermistor
12
Outlet air thermistor
13
Freeze protection thermistor
14
Gas piping thermistor
19
Fan motor
Activation of the protection device for the indoor fan
20
Sensor on
outdoor unit
Compressor thermistor
21
High pressure sensor
22
Outdoor air thermistor
23
Discharge gas thermistor
24
Evaporating thermistor
29
Low pressure sensor
31
System
Incorrect capacity setting of outdoor unit and indoor unit
32
Incorrect setting of other indoor unit number
35
Incorrect setting of indoor unit number
36
Incorrect of indoor unit combination
38
Abnormality of picking up circuit for protection in outdoor unit
39
Compressor
Abnormality running current at constant speed compressor
41
Pressure
Overload cooling
42
Overload heating
43
Protection device
Activation of pressure ratio decrease protection device
44
Activation of low pressure decrease protection device
45
Activation of low pressure increase protection device
46
Activation of high pressure increase protection device
47
Activation of high pressure decrease protection device
48
Activation of overcurrent protection device
51
Inverter
Abnormal inverter current sensor
52
Activation of inverter overcurrent protection
53
Activation of transistor module protection
54
Abnormality of inverter fin temperature
56
Outdoor fan
Abnormality of detection for fan motor position
57
Activation of fan controller protection
58
Abnormality of fan controller
b0
System
Incorrect setting of unit capacity
b1
Incorrect setting of unit and refrigerant cycle number
b5
Incorrect setting of indoor unit number for H-LINK type.
ee
Compressor
Compressor protection alarm
TrOUBLESHOOTING
PMML0254A rev.4 - 12/2018
21
EN