Oil Tank Peripheral Circuit Leakage/Blockage Check Procedure - Toshiba HFCR407C Service Manual

( *1) Oil tank peripheral circuit 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.
When operation has started
During detection of oil level
Judgement result of oil level
In case of judgment result "A0" "A1"
In case of judgment result "A4"
Check the following items.
4. Start a trial operation, confirm that AC220V–240V-power is on
to SV3C valve.
5. After operation for several minutes check the temperature at
the secondary side of SV3C (A.)
When temperature is high (equivalent to discharge
temperature at (B)), valve is not blocked.
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 either side of (C).
If leakage is found, replace the part.
Troubleshooting
Diagnostic procedure for check code
7 segment display
"OL" "- - "
"OL" "FF" or "Numerical"
"OL" "AO" "A1" or "A4"
Oil level is adequate. Resume the operation.
Possibility of oil tank circuit leakage/blockage is considered.
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SV3C
Valve
Sensor TK1
strainer
Oil
• •
separator
(A) (B)
Capillary
Strainer
Sensor
TK2 Compressor
Oil tank
Check Oil
Valve
removal
valve
SV3A
valve
Check
valve
Strainer
Balancing pipe valve
Check joint
Capillary
Strainer
Accumulator
Check
joint
Valve
Check
SV3B
valve
Strainer
Strainer
14