Hitachi RAS-8.0HNBRMQ1 - Page 71

64
(3) Alarm Code
Alarm
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, Problem
of Drain Piping, Float Switch, or Drain Pan)
02 Outdoor Unit
Activation of Protection
Device (High Pressure Cut)
Activation of PSH (Pipe Clogging, Excessive Refrigerant,
Inert Gas Mixing)
03
Communication
Abnormal Communication between
Indoor and Outdoor
Incorrect Wiring, Loose Terminals, Disconnected
Communication Cable, Blowout of Fuse, Outdoor Unit
Power OFF
04
Abnormal Communication between
Inverter PCB and Outdoor PCB
Inverter PCB-Outdoor Unit PCB Communication Failure
(Loose Connector, Wire Breaking, Blown of Fuse)
05 Supply Phase Abnormality of Power Supply Phases
Incorrect Power Supply, Incorrect Connection (Reversed Phase),
Open-Phase
06 Voltage Abnormal Inverter Voltage Outdoor Voltage Drop, 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, Disconnected Wiring, Broken Wire, Short Circuit
12 Abnormality of Outlet Air Thermistor
13 Abnormality of Freeze Protection
14 Abnormality of Gas Piping Thermistor
15
Abnormality of Outdoor Air Thermistor
(ECONO)
16
Abnormality of Remoter
Sensor(DOAS)
17
Abnormality of Thermistor Built-in
Wired Controller
18
Fan Motor on
Indoor Unit
Activation of Protection Device for
Invertor PCB of Indoor Fan
19
Activation of Protection Device for
Indoor
Fan Motor Overheat, Lockup
1A
Abnormality of Fin Temperature of
Indoor Fan Controller
1b Overcurrent of Indoor Fan Controller
1C
Abnormality of Current Sensor of
Indoor Fan Controller
1d
Indoor Fan Controller Protection
Action
1E Abnormality of Voltage of Indoor Fan
Controller
TROUBLESHOOTING