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14
Troubleshooting
Diagnostic procedure for check code
Oil
separator
Sensor TK1
SV3C
Valve
strainer
(D)
Check joint
Capillary
Strainer
Accumulator
Check
joint
Capillary
Strainer
Sensor
TK2
Compressor
Valve
SV3A
Oil tank
Check
valve
Check
valve
Oil
removal
valve
Valve
SV3B
Check
valve
Balancing pipe valve
Strainer
Strainer
•
•
•
(A)
(C)
(B)
( *1) 2-way valve leakage/blockage check procedure
1. After resetting the power supply, start a trial operation.
2. Set SW01/SW02/SW03 on interface PC board to
1/16/1, respectively.
3. Check the 7 segment display of the interface PC board.
In case of judgment result “A0”
Oil level is adequate. Resume the operation.
In case of judgment result “A1” Oil level is insufficient. Check the following items.
Remove SV3C valve coil, reset the power supply, and start the trial operation.
4. After operation for several minutes, check temperature at
secondary side of SV3C valve (A).
When temperature is high (Equivalent to discharge temp.),
leakage occurs from SV3C valve.
Replace SV3C coil.
5. Remove SV3A coil, and start a trial operation under condition
that AC220V–240V-power is on and SV3C valve is connected.
6. After operation for several minutes, check temperature at
secondary side of SV3A valve (B).
When temperature is high (equivalent to discharge temp.),
leakage occurs from SV3A valve.
Replace SV3A coil.
7. Using charge hose, etc., connect the check joint of gas pipe (D)
and the charge port of balancing pipe.
8. Start a trial operation under condition that AC220V–240V-power is and to SV3B valve is connected.
9. After operation for several minutes, check temperature at secondary side of SV3B valve (C).
When temperature is low (equivalent to suction temp.), blockage occurs in SV3B valve or strainer.
Replace blocked part.
( *2) Blockage check procedure for oil return circuit of oil separator
1. Check temperature of oil circuit during operation of outdoor unit.
If temperature is low, clogging occurs in capillary or strainer. Replace blocked part.
7 segment display
When operation has started “OL” “- - “
During detection of oil level “OL” “FF” or “Numerical”
Judgement result of oil level “OL” “AO” or “A1”
Check code Operation cause
[d8] TK1 sensor out of place, miswiring, resistance value
Oil temperature (TK1) detection alarm characteristics error
Is resistance value
characteristics of TK1 sensor
normal ?
Yes
Is TK1 sensor out of place ?
Sensor error.
Yes
No
No
Check interface PC board.
Modify sensor mounting.
[]
Is there miswiring of
TK1/TK2/TK3 sensor ?
Yes
No
Modify miswiring.
TK1 sensor: CN516
TK2 sensor: CN515
TK3 sensor: CN507
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