Operation of diagnostic function

 

 

 

 

 

 

 

 

 

Check code

 

 

 

 

 

 

 

 

 

 

Judgment and measures

Indoor unit

Cause of operation

Status of

Condition

 

 

 

air conditioner

 

 

before

after

 

 

 

 

 

 

 

 

 

3 series

4 series

 

 

 

 

 

 

 

 

 

 

 

 

H03

Current detection circuit error

Stop

Displayed when

1. Check outdoor P.C. board (MCC-1596).

 

error is detected

 

(AC current detection circuit)

 

 

 

 

 

H03

 

 

 

 

 

 

P05

Open phase of 3-phase power

Stop

Displayed when

1.

Check open phase of 3-phase power supply.

 

 

2.

Black lead wire to be connected to CN03 of MCC-1596

 

supply

error is detected

 

 

 

 

 

 

 

does not pass through T611.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.

Check connection of Ps sensor connector.

 

 

 

 

Displayed when

2.

Check failure of Ps sensor.

 

F23

Ps sensor error

Stop

3.

Check compressing power error of compressor.

 

error is detected

 

 

 

 

4.

Check 4-way valve error.

 

 

 

 

 

 

 

 

 

 

5.

Check outdoor P.C. board error.

 

 

 

 

 

 

 

 

 

 

 

 

1.

Check service valves are fully opened.

H06

 

 

 

 

 

(Gas side, Liquid side)

 

 

 

 

2.

Check clogging of outdoor PMV. (PMV1, 2)

 

 

 

 

 

 

 

 

 

Displayed when

3.

Check SV2 circuit.

 

 

 

 

 

 

 

H06

Low pressure protective operation

Stop

error is detected

4.

Check Ps sensor error.

 

 

 

 

 

5.

Check clogging of indoor filter.

 

 

 

 

 

6.

Check clogging of refrigerant pipe.

 

 

 

 

 

7.

Check of outdoor fan operation. (In heating mode)

 

 

 

 

 

8.

Check short of refrigerant.

 

 

 

 

 

 

 

 

 

Discharge temp. error

 

Displayed when

1.

Check refrigerating cycle (Gas leak)

P03

P03

Discharge temp. (TD) over

Stop

2.

Trouble of electronic expansion valve

error is detected

 

 

specified value was detected.

 

3.

Check discharge temp. sensor (TD).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.

Check case thermostat and connector.

 

 

Case thermostat operation

 

Displayed when

2.

Check gas leak, recharge

 

H04

Stop

3.

Check full open of service valve.

 

Abnormal overheat of compressor

 

error is detected

 

 

 

4.

Check PMV (Pulse Motor Valve).

 

 

 

 

 

 

 

 

 

 

5.

Check broken pipe.

 

 

 

 

 

 

 

 

 

 

 

 

1.

Check service valves are fully opened.

 

 

 

 

 

 

(Gas side, Liquid side)

 

 

 

 

 

2.

Check of outdoor fan operation.

 

 

 

 

 

3.

Check motor error of outdoor fan.

 

 

 

 

Displayed when

4.

Check clogging of outdoor PMV. (PMV1, 2)

 

P04

High pressure SW system error

Stop

5.

Check clogging of heat exchanger in indoor/outdoor units.

 

error is detected

 

 

 

 

6.

Short-circuit status of suction/discharge air in outdoor unit.

 

 

 

 

 

P04

 

 

 

 

7.

Check outdoor P.C. board error.

 

 

 

 

8.

Check fan system error (Cause of air volume drop) at

 

 

 

 

 

 

 

 

 

 

 

indoor side.

 

 

 

 

 

9.

Check PMV opening status in indoor unit.

 

 

 

 

 

 

 

 

P05

Power supply voltage error

Stop

Displayed when

1.

Check power supply voltage. AC342 to 457V

 

error is detected

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.

Check outdoor heat exchanger sensor (TL).

 

 

High pressure protective operation

 

 

2.

Check indoor heat exchanger sensor (TC, TCJ).

 

 

• During cooling operation, outdoor

 

 

3.

Check full open of service valve.

 

P20

temp. sensor (TL) detected

Stop

Displayed when

4.

Check indoor/outdoor fan.

 

temperature over specified temp.

 

 

 

error is detected

5.

Check PMV (Pulse Motor Valve).

 

 

• During heating operation, indoor

 

 

 

 

 

 

 

 

 

6.

Check clogging and short circuit of indoor/outdoor heat

 

 

temp. sensor (TC, TCJ) detected

 

 

 

 

temperature over specified temp.

 

 

 

exchanger.

 

 

 

 

 

7.

Overcharge of refrigerant. Recharge

 

 

 

 

 

 

 

 

 

 

 

 

1.

Check lock of fan motor.

P22

P22

Outdoor fan system error

Stop

Displayed when

2. Check power supply voltage between L2 and N.

error is detected

 

AC198 to 264V

 

 

 

 

 

 

 

 

 

 

3.

Check outdoor P.C. board.

 

 

 

 

 

 

 

 

 

 

 

 

1.

When performing operation while taking-off compressor

 

 

Short-circuit error of compressor

Stop

Displayed when

 

wire, P26 error occurs. Check control P.C. board

P26

P26

 

(MCC-1596).

driving element

 

error is detected

2.

When performing operation while taking-off compressor

 

 

 

 

 

 

 

 

 

 

 

wire, an error does not occur. (Compressor rare short)

 

 

 

 

 

 

 

P29

P29

Position detection circuit error

Stop

Displayed when

1.

Check control P.C. board (MCC-1596).

error is detected

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

– 38 –

Page 38
Image 38
Toshiba RAV-SM2802DT-TR, RAV-SM2802DT-E, RAV-SM2242DT-TR service manual H03 Current detection circuit error Stop

RAV-SM2802DT-TR, RAV-SM2242DT-TR, RAV-SM2802DT-E specifications

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