Hitachi RAS-2HVNP Installations- Und Betriebshandbuch Seite 41

20
1 Troubleshooting
Code
Category
number
01 Indoor unit Tripping of protection device
02 Outdoor unit Tripping of protection device
Abnormality between indoor (or outdoor) and
03
outdoor (or indoor)
Transmission
04 Abnormality between inverter and control PCB
Voltage drop by excessively low or high voltage
06 Voltage drop
to outdoor unit
07 Decrease in discharge gas superheat
Cycle
08 Increase in discharge gas temperature
11 Inlet air thermistor
12 Outlet air thermistor
Sensor on
13 Freeze protection thermistor
indoor unit
14 Gas piping thermistor
19 Tripping of protection device for fan motor
20 Compressor thermistor
22 Outdoor air thermistor
24 Evaporating thermistor
Sensor on
outdoor unit
31 Incorrect setting of outdoor and indoor unit
35 Incorrect setting in indoor unit number
38 Abnormality of protective circuit in outdoor unit
Overload cooling
41
(Possibility of high pressure device activation)
Overload heating
42
(Possibility of high pressure device activation)
Pressure
Activation of low pressure decrease protection
47
device
48 Protection activation for overload operation
51 Abnormality of current sensor for inverter
53 Protection activation of transistor module
Inverter
54 Inverter fin temperature increase
55 Inverter abnormality
57 Outdoor fan Fan motor abnormality
Indoor unit
b1 Incorrect unit number setting
number setting
EE Compressor Compressor protection alarm
41
PMML0248A
Content of abnormality Leading cause
Failure of fan motor, drain discharge, PCB, relay, float switch activa-
ted
Activation of PSH, locked motor
Incorrect wiring, failure of PCB, tripping of fuse, power supply OFF
Failure in transmission between PCBs for inverter
Voltage drop of power supply. Incorrect wiring or insufficient capacity
of power supply wiring
Excessive refrigerant charge, expansion valve open lock
Insufficient refrigerant, refrigerant leakage, clogging or expansion
valve close lock
Failure of thermistor, sensor, connection
Failure of fan motor
Failure of thermistor, sensor, connection
Incorrect setting of capacity code
Duplication of indoor unit number
Failure of indoor unit PCB. Incorrect wiring connection to PCB in
indoor unit.
Outdoor unit pipe thermistor temperature is higher than 55ºC and the
compressor top temperature is higher than 95ºC when outdoor unit
protection device is activated
Indoor unit freeze protection thermistor temperature is higher than
55ºC and the compressor top temperature is higher than 95ºC when
outdoor unit protection device is activated
Stoppage by excessively decrease of evaporating temperature
(Te < -35ºC) is activated 3 times in one hour, locked motor in heating
operation
Excessive refrigerant. Pipe clogging. Compressor failure
Failure of control PCB
Inverter PCB abnormality.
Failure of compressor, clogging of heat exchanger
Abnormal inverter fin thermistor.
Clogging of heat exchanger
Abnormal outdoor fan
Failure of inverter PCB
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
Failure of compressor.