Hitachi RCI-1.0FSN4 Service Manual page 362

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