Error mode detected by outdoor unit
Operation of diagnostic function
Judgment and measures
Check
code
Cause of operation
Status of air
conditioner
Condition
F04
Disconnection, short of discharge
temp. sensor (TD)
Stop
Displayed when
error is detected
1. Check discharge temp. sensor (TD).
2. Check outdoor P.C.board.
F06
Disconnection, short of heat
exchanger temp. sensor (TE)
Stop
Displayed when
error is detected
1. Check temp. sensor (TE).
2. Check outdoor P.C.board.
F08
Disconnection, short of outside air
temp. sensor (TO)
Stop
Displayed when
error is detected
1. Check outside air temp. sensor (TO).
2. Check outdoor P.C.board.
F12
Disconnection, short of suction
temp. sensor (TS)
Stop
Displayed when
error is detected
1. Check suction temp. sensor (TS).
2. Check outdoor P.C.board.
F13
Disconnection, short of heat sink
temp. sensor (TH)
Stop
Displayed when
error is detected
1. Check outdoor P.C.board.
(MCC-1627 (Q200) is incorporated in TH sensor)
F15
Miss-mounting of outdoor temp.
sensor (TE, TS)
Stop
Displayed when
error is detected
1. Check temp. sensor (TE, TS).
2. Check outdoor P.C.board.
F31
Outdoor P.C. EEPROM error
Stop
Displayed when
error is detected
1. Check outdoor P.C.board.
L10
Unset jumper of service P.C.board
Stop
Displayed when
error is detected
1. Outdoor service P.C.board.
Check model type setting jumper wire.
L29
Communication error between
MCUs of outdoor unit,
Stop
Displayed when
error is detected
1. Check outdoor P.C.board.
2. Check connection between outdoor P.C.boards.
H01
Compressor break down
*
Although operation has started,
operation frequency decreases
and operation stops.
Stop
Displayed when
error is detected
1. Check power supply voltage. (AC342 to 457V)
2. Overload operation of refrigerating cycle.
H02
Compressor lock
*
Over-current detection after
compressor start-up
Stop
Displayed when
error is detected
1. Trouble of compressor (Lock, etc.) : Replace
compressor.
2. Wiring error of compressor (Open phase).
H03
Current detection circuit error
Stop
Displayed when
error is detected
1. Check outdoor P.C.board.
(AC current detection circuit)
H04
Case thermostat operation
*
Abnormal overheat of
compressor
Stop
Displayed when
error is detected
1. Check case thermostat and connector.
2. Check gas leak, recharge.
3. Check full open of service valve.
4. Check PMV (Pulse Motor Valve).
5. Check broken pipe.
F07
Disconnection, short of heat
exchanger temp. sensor (TL)
Stop
Displayed when
error is detected
1. Check temp. sensor (TL).
2. Check outdoor P.C.board.
FILE NO.SVM-18044
-1
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