Toshiba RAS-2M21U2ACVG-SG Service Manual page 73

Check Outdoor
code LED display
 *
[1C]
(Continued)
 *
*
  *
*

* 
*

 *
[1d] 
:ON ( *:3 sec ON / 0.5 sec OFF) :OFF
(Item without special mention indicates part of outdoor unit.)
[A room gas side temp. sensor (TGa) error]
Is connection of CN604
on P.C.B MCC-1665 correct?
Is resistance value of TGa sensor correct?
YES
[B room gas side temp. sensor (TGb) error]
Is connection of CN605
on P.C.B MCC-1665 correct?
Is resistance value of TGb sensor correct?
YES
[C room gas side temp. sensor (TGc) error]
Is connection of CN606
on P.C.B MCC-1665 correct?
Is resistance value of TGc sensor correct?
YES
[Communication error between MCUs]
Are connections of CN802 on P.C.B MCC-1665
and CN806 on P.C.B MCC-1645 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
- 73 -
Check and troubleshooting
NO
Check outdoor P.C.B. MCC-1665.
NO
Check outdoor P.C.B. MCC-1665.
NO
Check outdoor P.C.B. MCC-1665.
NO
NO
NO
YES
NO
NO
Check outdoor P.C.B MCC-1665.
Correct connector.
Sensor error → Replace.
Defect → Replace.
Correct connector.
Sensor error → Replace.
Defect → Replace.
Correct connector.
Sensor error → Replace.
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-1645.
Defect → Replace.
Compressor lock → Replace.
Check PMV.
Detect → Replace.
Defect → Replace.