10 Troubleshooting
Outdoor and indoor alarm codes
SMGB0099 rev.0 - 12/2016
348
Code
number
Category
Abnormality
Cause
41
Pressure
Cooling overload (possible activation of high
pressure device)
OU pipe thermistor temperature is higher than 55 ºC and
the compressor top temperature is higher than 95 ºC,
OU protection device is activated.
42
Heating overload
(high-pressure device may be activated)
If IU freeze protection thermistor temperature is higher
than 55 ºC and compressor top temperature is higher
than 95 ºC, OU protection device is activated.
43
Activation of the safety device from
compression ratio decrease
Abnormal compressor (Compressor, Inverter damage)
44
Activation of the safety device from
excessively high suction pressure
Overload during cooling, high temperature with heating,
locked expansion valve
45
Protection
device
Activation of the safety device from
excessively high discharge pressure
Overload (obstruction of HEX, short circuit) mixture of
inert gas, excessive refrigerant.
47
Activation of the safety device from
excessively low suction pressure
(protection from vacuum operation)
(low pressure decrease prevention)
Shortage or leakage of refrigerant, piping clogging,
expansion valve close-locked, fan motor locked.
48
Activation of overcurrent protection
Overload, overcurrent. Failure of DIP IPM, IPM or PCB2,
heat exchanger clogged, locked compressor. EVI/EVO
failure. Cycle abnormality.
51
Inverter
Abnormal operation of the current sensor
Incorrect wiring of current sensor. Failure of control PCB,
DIP IPM, IPM or PCB2.
53
Inverter fin temperature increase
Inverter module (IPM, DIP-IPM) and PCB2 abnormality.
Failure of compressor, clogging of heat exchanger.
54
Abnormality of inverter fin temperature
Heat exchanger clogging. Fan motor failure
55
Abnormality of inverter module (not working) Failure of DIP-IPM, IPM or PCB2.
57
Outdoor fan
Fan Motor abnormality
Disconnected wire of incorrect wiring between control
PCB and inverter PCB. Incorrect wiring or fan motor
abnormality.
EE
Compressor
Compressor protection
"Compressor failure. This alarm code appears when the
following alarms 02, 07, 08, 45, 47 occur three times
within 6 hours."
b0
IU model
setting
Incorrect setting of unit model
No setting of unit capacity or incorrect setting of unit
capacity
b1
Number setting
Incorrect setting address or refrigerant cycle Over 64 indoor units setting by number or indoor unit
address.
b5
Incorrect setting of indoor unit number for
H-LINK type
The number of indoor units connected to the H-Link II of
one system is 17 or higher
?
N O T E
(*) In the case of RPI-16/20, the fan motor of both units is stopped immediately upon occurrence of an alarm at either of the units (upper or
lower side). The remote control switch indicates the cause of alarm (codes 1, 11, 12, 13, 14, 19) for the unit where the alarm has occurred,
while alarm code 19 (Fan motor stoppage) is indicated for the other unit. Therefore it is necessary to check both units only in case of
occurrence of alarm 19.
