3-90
Check code
Operation cause
[d9]
TK2 temperature detection circuit alarm
1. TK2 sensor out of place, miswiring, resistance value
characteristics error
2. Oil tank peripheral circuit error
Check valve leakage
Capillary blockage
Strainer blockage
[ ]
YES
YES
YES
YES
YES
NO
NO
NO
NO
Leakage/blockage
Is TK2 sensor out of place?
Does TK2 sensor circuit
contact with discharge pipe?
Is there miswiring of
TK1/TK2/TK3 sensor?
Is resistance value characteristics
of TK2 sensor normal?
Is there leakage or blockage in
peripheral circuit of oil tank? (
*
1)
Check interface P.C. board.
[ ]
TK1 sensor : CN516
TK2 sensor : CN515
TK3 sensor : CN507
Correct pipe so that TK2 sensor
circuit does not contact with
discharge pipe.
Replace leaked/blockage part.
Sensor error
Modify miswiring.
Modify sensor mounting.
Accumulator
Balancing pipe valve
Oil
tank
SV3C valve
Check joint
Strainer
Strainer
Strainer
SV3A
valve
SV3B
valve
TK1
sensor
Check
valve
Check
valve
Check
valve
Capillary
Capillary
TK2
sensor
Oil
removal
valve
Compressor
Oil
separator
A
B
C
( * 1) Oil tank peripheral circuit leakage/blockage check procedure
1. After resetting power supply, start a trial operation.
2. Set SW01/SW02/SW03 on interface P.C. board to
1/16/1, respectively.
3. Check display on the 7 segment of interface P.C. board.
In case of judgment result “A0” “A1”
→
Oil level is adequate. Resume the operation.
In case of judgment result “A4”
→
Possibility of oil tank circuit leakage/blockage is considered
Check the following items.
4. Start a trial operation under condition that
AC220–240V, 50Hz (
AC220V, 60Hz
)
power is on to SV3C valve.
5. During operation, check whether discharge gas flows
to the strainer secondary side (A part in the right
figure) at downstream of TK2 sensor circuit, and
capillary secondary side (B part in the right figure).
→
If blocked part is found, replace the part.
6. During operation, check whether leakage occurs in
the check valve (Two positions) of pipe connecting
the oil tank and compressor case.
(Check temperature of C part in the right figure.)
→
If leakage is found, replace the part.
7 segment display
When operation has started
“OL” “– –”
During detection of oil level
“OL” “FF” or “Numeral”
Judgment result of oil level
“OL” “A0” “A1” or “A4”
