Toshiba RAV-SM2804AT7, RAV-SM2804AT8ZG-E, RAV-SM2244AT7 P04, Display High pressure SW system error

Check

Outdoor

Check and troubleshooting

code

LED display

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

[P03]

<Display 1>

<Display 2>

[Discharge temp. error]

¡

¡

¡

l

Is there no gas leak?

NO

Repair defective position.

l

l

Is refrigerant charge amount adequate?

Recharge refrigerant.

¡

l

YES

¡

¥

NO

Repair defective position.

¡

¥

Is PMV

normal?

Replace defective part.

YES

Is it not abnormal overload?

YES

Correct and clear the cause.

NO

Is CN603 connection normal?

NO

Correct connector.

Is resistance value of TD sensor normal?

Sensor error →

Replace

YES

Check outdoor P.C. board (MCC-1599).

Defect → Replace

[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, (4) case thermo operation.

<Display 1>

<Display 2>

[High pressure SW system error]

¡

¡

Power supply error (Vdc), High pressure protective operation, Case thermostat

¡

l

operation.

l

l

Doesn’t high pressure switch

NO

NO

Is circuit wiring normal?

Wiring check,

¥

¡

operate?

Correct.

l

¡

YES

YES

¡

l

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 trial operation according

C

←

Heating operation

to the season.

Check Comp. IPDU PC board

B Cooling operation.

Defective →

Replace

NO

Is there no fan breakage

NO

Does cooling outdoor fan

normally operate?

or coming-off?

YES

YES

Repair defective position.

Connection of connectors,

Fan IPDU, Fan motor, Wiring.

Is there any element

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

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