Mitsubishi MSZ-HC35VA Service Manual download pdf (Page 28)

3. Outdoor unit failure mode table

The upper

lamp of

OPERATION

INDICTOR

lamp (Indoor

unit)

Abnormal point

(Failure mode / protection)

LED indication

(Outdoor P.C. board)

Condition Correspondence

Indoor/outdoor

unit failure

mode recall

function

Outdoor unit

failure mode

recall function

OFF None (Normal)

—— ———

2-time ﬂ ash

2.5 seconds

OFF

Outdoor power system

—

Over current protection stop is

continuously performed 3 times within

1 minute after the compressor gets

started.

• Reconnect connectors.

• Refer to 11-5. ”How

to check inverter/

compressor”.

• Check stop valve.

○○

3-time ﬂ ash

2.5 seconds

OFF

Discharge temperature

thermistor

1-time ﬂ ash every

2.5 seconds

Thermistor shorts or opens during

compressor running.

• Refer to 11-5. ”Check

of outdoor thermistors”

Defective outdoor

thermistors can be

identiﬁ ed by checking

the blinking pattern of

LED.

○○

Defrost thermistor

Fin temperature thermistor 3-time ﬂ ash 2.5

seconds OFF

P.C. board temperature

thermistor

4-time ﬂ ash 2.5

seconds OFF

4-time ﬂ ash

2.5 seconds

OFF

Overcurrent 11-time ﬂ ash 2.5

seconds OFF

12 A (HC25) / 14 A (HC35) current ﬂ ow

into intelligent power module.

• Reconnect compressor

connector.

• Refer to 11-5. ”How

to check inverter/

compressor”.

• Check stop valve.

—

○

Compressor synchronous

abnormality (Compressor

start-up failure protection)

12-time ﬂ ash 2.5

seconds OFF

Waveform of compressor current is

distorted.

• Reconnect compressor

connector.

• Refer to 11-5. ”How

to check inverter/

compressor”.

—

○

5-time ﬂ ash

2.5 seconds

OFF

Discharge temperature

—

Temperature of discharge temperature

thermistor exceeds 116°C, compressor

stops. Compressor can restart if

discharge temperature thermistor reads

100°C or less 3 minutes later.

• Check refrigerant

circuit and refrigerant

amount.

• Refer to 11-5. ”Check

of LEV”.

—

○

6-time ﬂ ash

2.5 seconds

OFF

High pressure

—

Temperature of indoor coil thermistor

exceeds 70°C in HEAT mode. When

defrost thermistor exceeds 70°C in

COOL mode.

• Check refrigerant

circuit and refrigerant

amount.

• Check stop valve.

—

○

7-time ﬂ ash

2.5 seconds

OFF

Fin temperature/ P.C. board

temperature

7-time ﬂ ash 2.5

seconds OFF

Temperature of ﬁ n temperature

thermistor on the inverter P.C.

board exceeds 82°C (HC25) / 83°C

(HC35), or temperature of P.C. board

temperature thermistor on the inverter

P.C. board exceeds 81°C (HC25) / 85°

C (HC35).

• Check around outdoor

unit.

• Check outdoor unit air

passage.

• Refer to 11-5. ”Check

of outdoor fan motor”.

—

○

9-time ﬂ ash

2.5 seconds

OFF

Nonvolatile memory data 5-time ﬂ ash 2.5

seconds OFF

Nonvolatile memory data cannot be

read properly.

• Replace the inverter

P.C. board.

○○

10-time ﬂ ash

2.5 seconds

OFF

Discharge temperature

—

Temperature of discharge temperature

thermistor has been 50°C or less for 20

minutes.

• Refer to 11-5. ”Check

of LEV”.

• Check refrigerant

circuit and refrigerant

amount.

—

○

11-time ﬂ ash

2.5 seconds

OFF

DC voltage 8-time ﬂ ash 2.5

seconds OFF

DC voltage of inverter cannot be

detected normally.

• Refer to 11-5. ”How

to check inverter/

compressor”.

—

○

Each phase current of

compressor

9-time ﬂ ash 2.5

seconds OFF

Each phase current of compressor

cannot be detected normally.

12-time ﬂ ash

2.5 seconds

OFF

Overcurrent Compressor

open-phase

10-time ﬂ ash 2.5

seconds OFF

12 A (HC25) / 14 A (HC35) current ﬂ ow

into intelligent power module (IPM).

When the open-phase operation of

compressor is detected. When the

interphase short out occurs in the

output of the intelligent power module

(IPM). When the compressor winding

shorts out.

• Reconnect compressor

connector.

• Refer to 11-5. ”How

to check inverter/

compressor”.

—

○

14-time ﬂ ash

2.5 seconds

OFF

Stop valve (Closed valve) 14-time ﬂ ash 2.5

seconds OFF

Closed valve is detected by compressor

current.

• Check stop valve.

○○

NOTE: Blinking patterns of this mode differ from the ones of Troubleshooting check table (11-3.).

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 43 44

Comments to this Manuals

No comments

Mitsubishi MSZ-HC35VA Service Manual Page 28

Comments to this Manuals

Related products and manuals for Split-system air conditioners Mitsubishi MSZ-HC35VA