4. PREPARING FOR OPERATION AFTER PROLONGED SHUTDOWN

When the usage season starts, proceed with the following before starting operation: (1)Clean the air filter.

(2)Do not use the unit immediately. Turn the main power switch on for a period of 3 hours before restarting cooling / heating operation. This allows the compressors to come up to the correct operation temperatures. Failure to do this, could cause compressor failure.

5.PREPARING FOR PROLONGED SHUTDOWN

After the usage season is over, prepare the air conditioner for later use by: (1)Setting the power switch to OFF.

(2)Consulting your Air conditioning specialist for detailed information.

6.TROUBLESHOOTING

If any trouble occurs, turn the operation (start or run) switch off immediately.

Symptom

Possible cause

Remedy

 

Power failure.

Wait for power supply

 

recovery.

Both fan and compressor

 

 

 

Blown fuse of power

Contact your

do not run.

source switch.

Air conditioning specialist.

 

 

 

 

 

 

Excessively low power

Ask your electric power

 

source voltage.

company.

 

The set temperature of

For temperature control,

 

 

thermostat is

• decrease the set

 

• excessively high for

temperature at cooling.

 

cooling.

• increase the set

Fan runs but compressor

• excessively low for

temperature at heating.

heating.

 

 

 

does not run.

 

 

The room temperature is

Can not be operated as

 

 

• excessively low for

it is out of temperature

 

cooling.

control range.

 

• excessively high for

 

 

heating.

 

 

 

 

Fan runs but stops

Air outlet and inlet

Remove blocking matter.

are blocked.

 

immediately.

 

 

 

 

 

 

 

The filter installed in

Clean it.

 

the field is clogged

 

 

with dust.

 

Runs but without cooling/heating.

Windows and doors are

Close them.

being opened.

 

 

 

Air outlet and inlet

Remove blocking matter.

are blocked.

 

 

 

The set temperature of

For temperature control,

thermostat is

• decrease the set

• excessively high for

temperature at cooling.

cooling.

• increase the set

• excessively low for

temperature at heating.

heating.

 

 

 

Insufficient

Contact your

refrigerant charge.

Air conditioning specialist.

 

Note:

If the unit does not operate normally after troubleshooting, please contact your local equipment supplier or air conditioning contractor.

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Mitsubishi Electronics PRH-5, 20-L, 8, 10 Preparing for Operation After Prolonged Shutdown, Preparing for Prolonged Shutdown

20-L, 8, PRH-5, 15, 10 specifications

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