Toshiba RAV-SM1403AT-E1 service manual High pressure SW system error

Check

Outdoor

<DCheck and troubleshooting

code

LED display

(Item without special mention Indicates part of outdoor unit.)

[P04]

∗ There is a possibility that it is one of the following errors.

Confirm LED on outdoor P.C. board to judge which error it is. (1) high-pressure SW system error,

(2) power supply error (Vdc), (3) high-pressure protective operation.



[High pressure SW system error]



Power supply error (Vdc), High pressure protective operation.

z

NO

Doesn’t high pressure switch

NO

Wiring check,

z

Is circuit wiring normal?

operate?

Correct.



YES

{

YES

Are parts of

NO

Parts check

high pressure switch normal?

Defective → Replace

YES

NO

Is service valve fully opened?

Open service valve fully.

YES

Reset the power supply and

B

← Cooling operation

then do a test operation according

C

← Heating operation

to the season.

Check outdoor PC board

B Cooling operation.

Defective

→ Replace

NO

NO

Does cooling outdoor fan

Is there no fan breakage

normally operate?

or coming-off?

YES

YES

Repair defective position.

Connection of connectors,

outdoor P.C. board,

Is there any element

Fan motor, Wiring.

YES

which blocks heat exchanger

Elimination of

of the outdoor unit?

blocking element

￿ Clogging of heat exchanger

￿ Short circuit

NO

Overcharge of refrigerant/

Clogging/Pipe breakage/

Abnormal overload

C Heating operation

NO

Are connections of

NO

Does the heating indoor fan

connectors,capacitors

normally operate?

and fan motor normal?

YES

YES

Is there any element which

YES

blocks indoor heat exchanger?

Elimination of

Repair

￿ Filter clogging

blocking element

defective position.

￿ Clogging of heat exchanger

￿ Short circuit

NO

NO

Are characteristics

Clogging by refrigerant

overcharge/Pipe breakage/

of TC and TCJ sensor

Abnormal overload

resistance value normal?

YES

Check indoor P.C. board

Replace

Defective → Replace

TC or TCJ sensor.

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