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Error mode detected by outdoor unit
Operation of diagnostic function
Check code
Indoor unit
F04
F06
F08
H01
H02
H03
H06
L29
L31 ∗1
P03
P04
P22
P26
P29
Cause of operation
Disconnection, short of discharge temp. sensor
(TD)
Disconnection, short of outdoor temp. sensor
(TE, TS)
Disconnection, short of outside temp. sensor (TO)
Compressor break down
∗ Although operation has started, operation
frequency decreases and operation stops.
Compressor lock
∗ Over-current detection after compressor start-up
Current detection circuit error
Low pressure switch operated.
(Model with low-pressure switch)
Cooling: 30 seconds
Heating: 10 minutes
Overload for (compressing) of compressor,
outdoor unit error and other error
• Communication error between CDB and IPDU
(Coming-out of connector)
• Temperature error of heat sink (Temperature
over specified value was detected.)
Phase detection protective circuit operated.
Discharge temperature error
• Discharge temperature higher than specified
value was detected.
High-pressure protection error of TE sensor
(Temperature higher than specified value was
detected.)
High pressure switch
(Model with high pressure switch)
Outdoor fan system error
Short-circuit error of compressor driving element
Position detection circuit error
Status of
air conditioner
Stop
Stop
Continue
Stop
Stop
Stop
Stop
Stop
Continues
(Compressor stops.)
Stop
Stop
Stop
Stop
Stop
Condition
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Judgment anAd measures
1. Check discharge temp. sensor (TD).
2. Check outdoor P.C. board.
1. Check temp. sensor (TE, TS).
2. Check outdoor P.C. board (CDB, IPDU).
1. Check outside temp. sensor (TO).
2. Check outdoor P.C. board (CDB, IPDU).
1. Check power supply voltage.
(AC198 to 264V)
2. Overload operation of refrigerating cycle
1. Trouble of compressor (Lock, etc.):
Replace compressor.
2. Wiring error of compressor (Open phase)
1. Check outdoor P.C. board.
(AC current detection circuit)
1. Check the refrigerating cycle. (Gas leak)
2. Check low-pressure switch system circuit.
3. Check P.C. board of the outdoor CDB.
1. Check wiring of CDB and IPDU.
2. Abnormal overload operation of refrigerating
cycle.
3. Check power supply voltage.
1. Check phase missing.
2. Check outdoor P.C. board.
3. Check high pressure switch.
4. Check circuit wiring of high pressure switch.
1. Check refrigerating cycle. (Gas leak)
2. Trouble of electron expansion valve
3. Check piping sensor (Td).
1. Overload operation of refrigerating cycle
2. Check outdoor temperature sensor (TE).
3. Check outdoor control P.C. board.
(CDB and main P.C. board)
4. Check high pressure switch and circuit.
1. Check lock of fan motor.
2. Check power supply voltage. AC198 to 264V
3. Check outdoor P.C. board.
1. When performing operation while taking-off
compressor wire, P26 error occurs.
Check control P.C. board.
2. When performing operation while taking-off
compressor wire, an error does not occur.
(Compressor rare short)
1. Check control P.C. board.