Hitachi RCI-1.0FSN3 Service Manual page 273

8 Troubleshooting
Code
Category
number
Cooling overload (possible activation of high
41
pressure device)
Heating overload (high-pressure device may
42
be activated)
Activation of the safety device from com-
43
pression ratio decrease
Pressure
Activation of the safety device from excessi-
44
vely high suction pressure
Activation of the safety device from excessi-
45
vely high discharge pressure
Activation of the safety device from exces-
47 sively low suction pressure (protection from
vacuum operation)
48 Abnormality of current sensor for inverter
51 Abnormality of Current Sensor for Inverter
53 Inverter Protection activation of inverter module
54 Inverter fin temperature increase
55 Inverter Module abnormality
57 Outdoor fan Fan Motor abnormality
Incorrect setting of the unit and the refrige-
b1
rant cycle number.
Indoor unit
number setting
Incorrect indoor unit connection number
b5
setting
EE Compressor Compressor protection
261
SMGB0077 rev.0 - 01/2013
Abnormality
O.U. pipe thermistor temp. is higher than 55 ºC and the
compressor top temp. is higher than 95 ºC, O.U. protection
device is activated.
If I.U. freeze protection thermistor temp. is higher than
55 ºC and compressor top temp. is higher than 95 ºC, O.U.
protection device is activated.
Abnormal compress (Compressor, Inverter damage)
Overload during cooling, high temperature with heating,
loked expansion valve
Overload (obstruction of HEX, short circuit) mixture of inert
gas
Shortage or leakage of refrigerant, piping clogging, expan-
sion valve close-locked, fan motor locked.
Failure of DIP-IPM, heat exchanger clogged, locked com-
pressor, EVI/EVO failure or overcharge.
Failure of control PCB, inverter module.
Inverter module abnormality.
Failure of compressor, clogging of heat exchanger.
Abnormal inverter fin thermistor, clogging of heat exchan-
ger, abnormal outdoor fan.
Failure of inverter module.
Disconnected wire of incorrect wiring between control PCB
and inverter PCB.
Incorrect wiring or fan motor abnormality.
Over 64 indoor units setting by number or indoor unit
address.
There are more than 17 units not corresponding to H-Link
II connected to one system
Failure of compressor.
Cause
8