Troubleshooting - Hitachi FSN3E Installation And Operation Manual

TROUBLESHOOTING

Code
Category
number
01 Indoor unit Activation of the safety device
02 Outdoor unit Activation of the safety device
Abnormal transmission between outdoor and
03
indoor units
Transmission
Abnormal transmission between inverter PCB
04
(DIP-IPM) and outdoor unit PCB (PCB1)
05 Power supply Abnormal operation of picking up phase signal
Excessively low voltage or excessively high
06 Voltage
voltage for the inverter
07 Decrease in discharge gas superheat
Cycle
Excessively high discharge gas temperature at
08
the top of compressor
11 Air inlet thermistor
12 Air outlet thermistor
Sensor on indoor
unit
13 Freeze protection thermistor
14 Gas piping thermistor
Abnormal operation of thermistor for fresh
15 Econofresh
outdoor air
16 Remote thermistor
17 Sensor on indoor Thermistor of RCS
unit
Activation of the protection device for the indoor
19
fan motor
21 High pressure sensor
Thermistor for outdoor ambient temperature
22
(THM7)
Sensor on
23 Thermistor for discharge gas temperature (THM9) Incorrect wiring, disconnected wiring, broken cable, short circuit.
outdoor unit
24 Thermistor for evaporating temperature (THM8)
29 Low pressure sensor
Incorrect capacity setting or combined capacity
31
between outdoor and indoor units
35 Incorrect indoor unit number setting
System
36 Incorrect indoor unit combination
Abnormality of picking up circuit for protection
38
(Outdoor unit)
Activation of the safety device from compression
43
ratio decrease
Activation of the safety device from excessively
44
high suction pressure
Pressure
Activation of the safety device from excessively
45
high discharge pressure
Activation of the safety device from excessively
47 low suction pressure (protection from vacuum
operation)
33 PMML0354A rev.1 - 03/2015
Abnormality Cause
Failure of fan motor, drain discharge, PCB, relay, float switch
activated
Activation of PSH, locked motor, abnormal operation in the
power supply phase
Incorrect wiring, failure of PCB, tripping of fuse, power supply
OFF
Abnormal transmission between PCB
Main power supply phase is reversely connected or one phase
is not connected.
Incorrect wiring or insufficient capacity of power supply wiring
Discharge gas superheat less than 10 degrees is maintained for
30 minutes.
Temperature of top compressor: Td
Td > 132°C over 10 minutes, or Td >140°C over 5 minutes
Failure of thermistor, sensor, connection.
Failure of thermistor
Failure of thermistor
Failure of fan motor
Incorrect wiring, disconnected wiring, broken cable, short circuit.
Failure of thermistor, sensor, connection.
Failure of thermistor, sensor, connection.
Incorrect wiring, disconnected wiring, broken cable, short circuit.
Incorrect setting of the capacity code.
Duplication of indoor unit number , number of indoor units over
specifications.
R22 indoor unit
Failure of indoor unit PCB, incorrect wiring, connection to PCB
in indoor unit.
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, expansion
valve close-locked, fan motor locked.