[Db] Sv3C Valve Blockage Detection; Sv3C Valve Blockage Check Procedure - Toshiba HFCR407C Service Manual

Check code
[db]
SV3C valve blockage detection
Is there miswiring of
TK1/TK2/TK3 sensor ?
No
Is the resistance value
characteristics of TK1/TK2
sensor normal ?
Yes
Is the connection of SV3C valve
and the coil unit normal ?
No
Modify coil connection.
(SV3C: CN314)
Coil error Replace the coil.

( *1) SV3C valve 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 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 "A3"
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.
Troubleshooting
Diagnostic procedure for check code
Yes
No
Yes
Is there blockage in SV3C ?
Check interface PC board.
7 segment display
"OL" "- - "
"OL" "FF" or "Numerical"
"OL" "AO" "A1" or "A3"
Oil level is adequate. Resume the operation.
Possibility of SV3C valve circuit blockage is considered.
113
Operation cause
1. Blockage in SV3C valve
2. Blockage in SV3C valve circuit
Yes
No
SV3C
Valve
Sensor TK1
strainer
• •
(A) (B)
Capillary
Strainer
Sensor
TK2
Oil tank
Check
Oil
Valve
valve
SV3A removal
Check
valve
valve
Strainer
Balancing pipe valve
Modify miswiring.
[
]
TK1 sensor: CN516
TK2 sensor: CN515
TK3 sensor: CN507
Sensor error.
Replace blocked part.
Check joint
Capillary
Oil
separator
Strainer
Accumulator
Check
joint
Compressor
Valve
Check
SV3B
valve
Strainer
Strainer
14