Toshiba RAS-M16PKVP-E Service Manual page 110

Check Outdoor
code LED display
l l
¡¡ ¡¡
[1C]
l l
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(Continued)
ll
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l ll l
¡ ¡
[1D]
ll l l
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[1E]
(Item without special mention indicates part of outdoor unit.)
[Communication error between MCUs]
Are connections of CN802 on P.C.B MCC-5071
and CN802 on P.C.B MCC-1571 correct?
YES
[Communication error between MCUs]
Are connections of CN804 on P.C.B MCC-5071
and CN800 on P.C.B MCC-1571 correct?
YES
[Compressor lock]
Is AC mains voltage correct?
(198 to 264V)
YES
Is wire connection correct?
Compressor lead
(Board side, Compressor Side),
Reactor lead, Power supply lead.
YES
Is compressor under correct condition?
NO
Is there refrigerant stagnation?
YES
Does PMV correctly operate?
YES
[Discharge temp. error]
Is there gas leak?
Is there refrigerant shortage?
NO
Is PMV under correct conditions?
YES
Does an abnormal overload happen?
NO
Is connection of CN600 on P.C.B. MCC-5071?
Is resistance value of TD sensor correct?
YES
– 110 –
Check and troubleshooting
NO
NO
NO
NO
YES
NO
NO
YES
NO
YES
NO
Correct connection.
Check outdoor P.C. Boards.
Defect → Replace.
Correct connection.
Check outdoor P.C. Boards.
Defect → Replace.
Check wiring construction.
Ask repair of power supply.
Check wire connection
and correct it.
Check outdoor P.C.B MCC-1571.
Defect → Replace.
Compressor lock → Replace.
Check TE, TS sensors and PMV.
Detect → Replace.
Check outdoor P.C.B MCC-5071.
Defect → Replace.
Repair defective position.
Recharge refrigerant.
Repair defective position.
Replace defective part.
Remove and improve
the cause of overload.
Correct connector.
Sensor error → Replace.
Check outdoor P.C.B MCC-5071.
Defect → Replace.