Outdoor And Indoor Alarm Codes - Hitachi RCI-1.0FSN3 Service Manual

8 Troubleshooting

8.5 Outdoor and indoor alarm codes

Code
Category
number
01 Indoor unit
02 Outdoor unit
03
Transmission
04
05 Power supply
06 Voltage
07
Cycle
08
11
12
Sensor on indoor
unit
13
14
16
Sensor on indoor
17
unit
19
20
21
22
Sensor on
outdoor unit
23
24
29
31
35
System
36
38
260
SMGB0077 rev.0 - 01/2013
Abnormality
Activation of the safety device
Activation of the safety device
Abnormal transmission between outdoor
and indoor units
Abnormal transmission between inverter
PCB (DIP-IPM) and outdoor unit PCB
(PCB1)
Abnormal operation of picking up phase
signal
Excessively low voltage or excessively high
voltage for the inverter
Decrease in discharge gas superheat
Excessively high discharge gas temperature
at the top of compressor
Air inlet thermistor
Air outlet thermistor
Freeze protection thermistor
Gas piping thermistor
Remote thermistor
Thermistor of RCS
Activation of the protection device for the
indoor fan motor
Compressor thermistor
High pressure sensor
Thermistor for outdoor ambient temperature
(THM7)
Thermistor for discharge gas temperature
(THM9)
Thermistor for evaporating temperature
(THM8)
Low pressure sensor
Incorrect capacity setting or combined capa-
city between outdoor and indoor units
Incorrect indoor unit number setting
Incorrect indoor unit combination
Abnormality of picking up circuit for protec-
tion (Outdoor unit)
Cause
Failure of fan motor, drain discharge, PCB, relay, float
switch activated
Failure of fan motor, drain discharge, PCB, relay, float
switch activated
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 maintai-
ned 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
Failure of thermistor, sensor, connection.
Incorrect wiring, disconnected wiring, broken cable, short
circuit.
Failure of thermistor, sensor, connection.
Incorrect wiring, disconnected wiring, broken cable, short
circuit.
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.