Mitsubishi Electric MXZ-3C68VA Service Manual download pdf (Page 60)

Primary current protection

Secondary current protection

High-pressure protection

Defrosting in cooling

3 times

Lighting

Discharge temperature

protection

4 times

Lighting

Low discharge

temperature protection

• Check refrigerant circuit and refrigerant amount.

• Refer to 11-6. "Check of LEV".

• Refer to 11-6. "Check of outdoor thermistors".

• Refer to 11-6. "Check of LEV".

• Check refrigerant circuit and refrigerant amount.

5 times

Lighting

Cooling high-pressure

protection

This symptom does not mean any abnormality of the

product, but check the following points.

• Check indoor filters are not clogged.

• Check there is sufficient refrigerant.

• Check indoor/outdoor unit air circulation is not short cycling.

These symptoms do not mean any abnormality of the

product, but check the following points.

• Check indoor filters are not clogged.

• Check there is sufficient refrigerant.

• Check indoor/outdoor unit air circulation is not short cycling.

Twice Lighting

Once Lighting

The outdoor heat exchanger temperature exceeds 58°C during operation.

9 times

Lighting

Inverter check mode

Lighting

Normal

The unit is operated with emergency operation switch.

The primary current exceeds 15 A (MXZ-3C54/3C68/4C71VA)/

17 A (MXZ-4C80VA)/18 A (MXZ-5C100VA).

The current of the compressor exceeds 12 A (MXZ-3C54/3C68/4C71VA)/

10 A (MXZ-4C80/5C100VA).

The indoor gas pipe temperature exceeds 45°C during heating.

The indoor gas pipe temperature falls 3°C or below during cooling.

The discharge temperature exceeds 100°C during operation.

The frequency of the compressor is kept 80 Hz or more and the discharge

temperature is kept under 50°C (cooling) /40°C (heating) for more than

40 minutes.

Outdoor electronic control P.C. board(Parts side)

LED2

LED1

Lighting

LED1

LED2

Lighting

MXZ-3C54/3C68/4C71VA

MXZ-4C80/5C100VA

LED1(Red) LED2(Yellow)

Abnormal point / Condition Remedy

Indication

Condition

No.

Outdoor unit

operates

normally.

Outdoor unit

operates.

Symptom

The flashing frequency shows the number of times the LED blinks after every 2.5-second OFF.

(Example) When the flashing frequency is “2”.

OFF

2.5-second OFF

0.5-second ON

NOTE 1. The location of LED is illustrated at the right figure. Refer to 11-7.1.

2. LED is lighted during normal operation.

1 2 ... 55 56 57 58 59 60 61 62 63 64 65 ... 269 270

Comments to this Manuals

No comments

Mitsubishi Electric MXZ-3C68VA Service Manual Page 60

Comments to this Manuals

Related products and manuals for Split-system air conditioners Mitsubishi Electric MXZ-3C68VA