FILE NO. SVM-03008

10-4-2. Caution at servicing

(1)After servicing, push the START/STOP button to return to the normal mode.

(2)After servicing by the check code, turn off breaker of the power supply, and turn on breaker of the power supply again so that memory in the microcomputer returns the initial status. However, the check codes are not deleted even if the power supply is turned off because they are stored in the fixed memory.

 

 

 

 

Table 10-4-1

 

 

 

 

 

 

 

 

 

 

 

Block distinction

 

Operation of diagnosis function

 

 

 

 

 

 

 

 

 

 

 

Judgment and action

Check

Block

Check

Cause of operation

 

Air conditioner

Remarks

 

 

 

 

code

code

 

status

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Indoor

 

Short-circuit or disconnec-

 

Operation

Displayed when

1. Check the room temp. sensor.

 

P.C.

 

tion of the room

 

continues.

error is detected.

2. When the room temp. sensor is

 

board

 

temperature sensor

 

 

 

 

normal, check P.C. board.

 

etc.

 

(TA sensor).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Being out of place,

 

Operation

Displayed when

1. Check heat exchanger sensor.

 

 

 

disconnection, short-circuit,

 

continues.

error is detected.

2.

When heat exchanger sensor is

 

 

 

or migration of heat

 

 

 

 

normal, check P.C. board.

 

 

 

exchanger sensor

 

 

 

 

 

 

 

 

(TC sensor)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Lock of indoor fan or trouble

 

All off

Displayed when

1. Check P.C. board.

 

 

 

on the indoor fan circuit

 

 

error is detected.

2.

When P.C. board is normal, check

 

 

 

 

 

 

 

 

the motor.

 

 

 

 

 

 

 

 

 

Not

 

Trouble on other indoor

 

Operation

Displayed when

Replace P.C. board.

 

displayed

 

P.C. boards

 

continues.

error is detected.

 

 

 

 

 

 

 

 

 

 

 

 

Connec-

 

Return serial signal is not

 

Operation

Flashes when

1.

When the outdoor unit never

 

ting cable

 

sent to indoor side from

 

continues.

trouble is

 

operate:

 

and serial

 

operation started.

 

 

detected on

 

(1) Check connecting cable, and

 

signal

 

(1) Defective wiring of

 

 

return serial

 

correct if defective wiring.

 

 

 

connecting cable

 

 

signal, and

 

(2) Check 25A fuse of inverter

 

 

 

(2) Operation of

 

 

normal status

 

P.C. board

 

 

 

compressor thermo.

 

 

when signal is

 

(3) Check 3.15A of inverter

 

 

 

Gas shortage

 

 

reset.

 

P.C. board.

 

 

 

Gas leak

 

 

 

2.

To display [Other] block during

 

 

 

 

 

 

 

 

operation, check compressor

 

 

 

 

 

 

 

 

thermo. operation and supply gas

 

 

 

 

 

 

 

 

(check gas leak also).

 

 

 

 

 

 

 

3.

Unit operates normally during

 

 

 

 

 

 

 

 

check.

 

 

 

 

 

 

 

 

If Return serial signal does not

 

 

 

 

 

 

 

 

stop between 2 and 3 of the

 

 

 

 

 

 

 

 

indoor terminal block, replace

 

 

 

 

 

 

 

 

inverter P.C. board.

 

 

 

 

 

 

 

 

If signal stops between indoor

 

 

 

 

 

 

 

 

terminal block 2 and 3, replace

 

 

 

 

 

 

 

 

indoor P.C. board.

 

 

 

 

 

 

 

 

 

 

 

Operation command signal

 

Operation

Flashes when

If return serial signal does not stop

 

 

 

is not sent to outdoor side.

 

continues.

trouble is

between indoor terminal block 2

 

 

 

 

 

 

detected on

and 3, replace inverter P.C. board.

 

 

 

 

 

 

operation

If signal stops between indoor

 

 

 

 

 

 

command signal,

terminal block 2 and 3, replace

 

 

 

 

 

 

and normal status

indoor P.C. board.

 

 

 

 

 

 

when signal is

 

 

 

 

 

 

 

 

reset.

 

 

 

 

 

 

 

 

 

 

 

– 56 –

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Toshiba RAS-13UKV-E2, RAS-13UAV-E2 service manual Cause of operation
Page 56 Page 58

RAS-13UAV-E2, RAS-13UKV-E2 specifications

The Toshiba RAS-13UKV-E2 and RAS-13UAV-E2 air conditioning units represent a significant step forward in both comfort and energy efficiency. Designed for residential and light commercial use, these models are packed with features that cater to diverse climate control needs while adhering to modern standards of sustainability.

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