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Alarm
Code
Activation of Protection Device
(01)
(Float Switch)
Activation of Protection Device
02
(High Pressure Cut)
Abnormal Communication between Indoor and
03
Outdoor Units
Abnormal Communication between Inverter PCB
04
and Outdoor PCB
05
Abnormality of Power Supply Phases
06
Abnormal Inverter Voltage
07
Decrease in Discharge Gas Superheat
08
Increase in Discharge Gas Temperature
(11)
Abnormality of Inlet Air Thermistor
(12)
Abnormality of Outlet Air Thermistor
(13)
Freeze Protection Thermistor
(14)
Abnormality of Gas Piping Thermistor
(16)
Abnormality of Remote Sensor (DOAS)
Abnormality of Thermistor Bulit-in Wired
(17)
Controller
Activation of Protection Device for Inverter
18
PCB of Indoor Fan
19
Activation of Protection Device for Indoor Fan
Abnormality of Fin Temperature of Indoor
(1A)
Fan Controller
(1b)
Overcurrent of Indoor Fan Controller
Abnormality of Current Sensor of Indoor
(1C)
Fan Controller
(1d)
Indoor Fan Controller Protection Action
Abnormality of Voltage of Indoor
(1E)
Fan Controller
20
Abnormality of Discharge Gas Thermistor
21
Abnormality of High Pressure Sensor
22
Abnormality of Outdoor Air Thermistor
Abnormality of Heat Exchanger Liquid Pipe
24
Thermister
29
Abnormality of Low Pressure Sensor
Incorrect Capacity Setting of Outdoor Unit
31
and Indoor Unit
35
Incorrect Setting of Indoor Unit No.
Table 7.2 Alarm Code
Malfunction
Activation of Float Switch (High Water Level in Condensation
Drainage Pan, Problem with Drain Piping, Float Switch, or
Condensation Drainage Pan)
Activation of PSH (Piping Clogging, Excessive Refrigerant, Inert Gas
Mixing)
Incorrect Wiring, Loose Terminals, Disconnect Wire, Blowout of Fuse,
Outdoor Unit Power OFF
Inverter PCB-Outdoor Unit PCB Communication Failure (Loose
Connector, Wire Breaking, Blown of Fuse)
Incorrect Power Source, Connection to Reversed Phase, Open-Phase
Outdoor Voltage Drop, Insufficient Power Capacity
Excessive Refrigerant Charge, Failure of Thermistor, Incorrect Wiring,
Incorrect Piping Connection, Expansion Valve Locking at Opened
Position (Disconnect Connector)
Insufficient Refrigerant Charge, Pipe Clogging, Failure of Thermistor,
Incorrect Wiring, Incorrect Piping Connection, Expansion Valve
Locking at Closed Position (Disconnect Connector)
Incorrect Wiring, Disconnecting Wiring Breaking Wire, Short
Circuit
Fan Motor Overheat, Lockup
Incorrect Wiring, Severed or Disconnecting Wiring, Short
Circuit
Incorrect Capacity Code Setting of Combination Excessive or
Insufficient Indoor Unit Total Capacity Code
Duplication of Indoor Unit No. in same Refrigerant Group
42
Reason
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