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