6.
THE REMOTE CONTROLLERS
87
CHECK
CODE
SYMPTON
STATUS
OF AIR
CONDITIONER
JUDGEMENT AND ACTION
DIAGNOSTIC FUNCTIONS
6.4
List of Check Codes
Operation continuing 1. Check the indoor temp. sensor
2. Check the indoor PCB.
ROOM TEMP.
SENSOR (TA)
Out of place, break,
short-circuit
Operation continuing 1. Check the indoor heat-exchanger
sensor.
2. Check the indoor PCB.
INDOOR
HEAT-EXCHANGER
SENSOR (TC)
Out of place, break,
short-circuit
Operation continuing 1. If Outdoor Unit does not work at all.
(1) Check the connecting cable for
incorrect wiring.
(2) Check the outdoor PCB.
2. It operates normally.
Between indoor terminal plates 2 and 3,
return signal is:
Available:
Check the indoor PCB.
Not available: Check the outdoor PCB.
RETURNING SIGNAL
NOT COMING TO
INDOOR
1) Wrong wiring in
connecting cable
(serial signal).
Operation continuing 1. Check the 4-way valve.
2. Check the 2-way valve and check valve.
3. Fault with indoor heat exchanger sensor.
4. Check the indoor PCB.
4-WAY VALVE
SYSTEM
1) Indoor heat-exchanger
temperature rises, after
starting cooling
operation.
2) Indoor heat-exchanger
temperature drops
after starting heating
operation.
Operation continuing 1. Compressor case thermostat, IOL, OL
operation.
(contactor OFF, compressor stops: AH8
Models)
(contactor ON, compressor stops: AH
Models)
2. Indoor heat-exchange sensor out of place.
3. Check the indoor PCB
4. Check that service valves are OPEN.
1. Check the charged amount of refrigerant
gas.
(Gas shortage
➔
gas supplement, check
for gas leaks)
2. Indoor fan locked.
OTHER CYCLE
SYSTEM
1) Indoor heat exchange
temperature does not
change after starting
cooling/heating
operation.
Full Stop
1. Check the defrosting sensor.
2. Check the outdoor PCB.
DEFROST
SENSOR (TE)
Out of place, break,
short-circuit.
2) When transmitting
instruction for
stopping compressor
by freeze preventing
control.
Outdoor Unit stops
(indoor fan L)
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