In Abnormal Condition; Power Failure; Alarmcodes - Hitachi PC-ARFP1E Installations- Und Betriebshandbuch

OTHER INDICATIONS

16.2 IN ABNORMAL CONDITION

16.2.1 Abnormality
The RUN indicator (Red) is flashing.
The indoor unit number, the alarm code, the model code, *model
name (Ex. RCI-3.0FSN3) and the connected number of indoor
units are displayed on LCD.
(*The unit model name is only displayed for the corresponding
unit model.)
In case that the plural indoor units are connected, the above
items for each indoor unit are displayed one by one.

16.2.2 Power failure

All the indications are OFF.
Once the unit is stopped by the power failure, the unit will not be
started again although the power recovers. Perform the starting
procedures again.
In case of instantaneous power failure within 2 seconds, the unit
will be started again automatically.
16.3 ALARM CODES
Code
Category
number
01 Indoor unit Activation of the safety device
02 Outdoor unit Activation of the safety device
Abnormal transmission between
03
outdoor and indoor units
Abnormal transmission between
04 Transmission inverter PCB (DIP-IPM) and outdoor
unit PCB (PCB1)
Abnormal transmission between fan
04.
controller and outdoor PCB
Abnormal operation of picking up phase
05 Power supply
signal
Excessively low voltage or excessively
06
high voltage for the inverter
Voltage
06. Abnormal fan controller voltage
07 Decrease in discharge gas superheat
Cycle
Excessively high discharge gas
08
temperature at the top of compressor
Activation of protection device for
09 Fan motor
outdoor fan
Abnormal transmission between
0A Transmission
outdoor and indoor unit
0b Incorrect outdoor unit address setting
Outdoor unit
Main unit of the outdoor unit incorrectly
0C
set
40 PMML0404A rev.1.1 - 06/2022
Abnormality
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
Fan controller - Outdoor PCB transmission fault (loose connector, broken
cable, blown fuse)
Main power supply phase is reversely connected or one phase is not
connected
Incorrect wiring or insufficient capacity of power supply wiring
Outdoor voltage drop, insufficient power
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
Fan motor overheat, locking
Incorrect wiring, broken cable, loose terminals
Duplicate address setting of outdoor units (secondary units) in the same
refrigerant system
Two or more outdoor units defined as the "main unit" in the same refrigerant
cycle system
16.2.3 Electric noise
There could be a case that all the indications are OFF and the
unit is stopped. This is occurred by the activation of the micro
computer for the unit protection from the electric noise.
Perform the starting procedures again.
Cause