Hitachi UTOPIA RAS-4HVRP2E - Alarm Codes of Wired Controller; Ras-(4-6)H(V)(R;N)(C;P)2 E

10 Troubleshooting
Troubleshooting procedure
SMGB0136 rev.0 - 07/2021
260
10.2.2 RAS-(4-6)H(V)(R/N)(C/P)2E
10.2.2.1 Alarm codes of wired controller
• TheRUNindicator(red)ashesontheremotecontrolswitch.
• The unit number, the alarm code and the unit model code and the number of connected indoor units are alternatively
displayed on the LCD, and the indoor unit number and the alarm code are displayed on the 7-segment display of
outdoor unit PCB1.
• Possible causes are:
- The remote cable is broken.
- Contact failure in remote control cable.
- IC or microcomputer defective.
- In all cases, contact your service provider.
PC-ARFP1E
SEL. OP MODE
I.U. : RCI-3.0FSN3
MODEL : b .02
Alarm Code:
22
O.U. : RAS-3HVRNM2
01-02
ALM RST
ADDR
ENT.
OK
IfRUNlampashes5times(5seconds)withunitnumberandalarmcodedisplayed,notethealarmcode(seetable
Alarm codes) and contact your service provider.
? NOTE
Depends on models some alarms or causes are not applicable.
Code Category Content of Abnormality Leading Cause
01 Indoor Unit
Activation of Protection Device (Float
Switch)
Activation of Float Switch (High Water Level in Drain Pan,
Abnormality of Drain Pipe, Float Switch, or Drain Pan)
02 Outdoor Unit
Activation of Protection Device
(High Pressure Cut) or Clixon
(compressor thermostat) activation (high
temperature cut)
Activation of PSH (Pipe Clogging, Excessive Refrigerant,
Inert Gas Mixing).
Activation of Compressor thermostat due to abnormality on
discharge temperature.
03
Communication
Abnormal Communication between
Indoor Units and Outdoor Units
Incorrect Wiring, Loose Terminals, Disconnected
Communication Cable, Blowout of Fuse, Indoor Unit Power
OFF
04
Abnormal Communication between
Inverter PCB and Outdoor PCB
Inverter PCB -Outdoor PCB Communication Failure
(Loose Connector, Wire Breaking, Blowout of Fuse)
05 Supply Phase Abnormality of Power Supply Phases Incorrect Power Supply or Open-Phase
06 Voltage Abnormal Inverter Voltage OutdoorVoltageDecrease,InsufcientPowerCapacity
07
Cycle
Decrease in Discharge Gas Superheat
Excessive Refrigerant Charge, Failure of Thermistor,
Incorrect Wiring, Incorrect Piping Connection, Expansion
Valve Locking at Opened Position (Disconnect Connector)
08 Increase in Discharge Gas Temperature
InsufcientRefrigerantCharge,PipeClogging,Failureof
Thermistor, Incorrect Wiring, Incorrect Piping Connection,
Expansion Valve Locking at Closed Position (Disconnect
Connector)
11
Sensor on
Indoor Unit
Abnormality of Inlet Air Thermistor
Incorrect Wiring, Disconnecting Wiring,
Breaking Wire, Short Circuit
12 Abnormality of Outlet Air Thermistor
13
Abnormality of Freeze Protection
Thermistor
14 Abnormality of Gas Piping Thermistor
15
Abnormality of Outdoor Air Thermistor
(EconoFresh)
16 Abnormality of Remote Sensor (DOAS)
17
Abnormality of Thermistor Built-in Remote
Controller (DOAS)