Toshiba RAS-2M21U2ACVG-SG Service Manual page 72

Check Outdoor
code LED display
[1C]
* * 
  
:ON ( *:3 sec ON / 0.5 sec OFF) :OFF
(Item without special mention indicates part of outdoor unit.)
∗ There is a possibility that it is one of the following errors.
Confirm LED on display P.C. board (MCC-1646) to judge which error it is.
Compressor system error, Compressor lock, Gas side temp. sensor (TGa to TGc)
error, Gas leakage, PMV error
[Compressor system error, 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
1
1
Are the power devices on P.C. board
MCC-1645 screwed without looseness?
(Rear sides of IC200, Q404, DB01, DB02) Are
radiation grease properly applied these?
YES
Does something block
the ventilation around the heat sink?
Does something air flow from the fan?
NO
- 72 -
Check and troubleshooting
NO
NO
YES
NO
NO
NO
Apply radiation grease to objective parts.
Retightening of screws.
YES
Check outdoor P.C.B MCC-1645 and MCC-1665.
Defect → Replace
Check wiring construction.
Ask repair of power supply.
Check wire connection
and correct it.
1
Compressor lock → Replace.
Check PMV.
Detect →
Replace..
Remove blocking matter.
Correct short-circuit.