Download Print this page

Troubleshooting - Mitsubishi 10 Data Book

Air-cooled rooftop packaged air conditioners
Hide thumbs

Advertisement

Table of Contents
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.
Both fan and compressor
do not run.
Fan runs but compressor
does not run.
Fan runs but stops
immediately.
Runs but without
cooling/heating.
Note:
If the unit does not operate normally after troubleshooting, please contact your local equipment supplier or
air conditioning contractor.
Symptom
Possible cause
Power failure.
Blown fuse of power
source switch.
Excessively low power
source voltage.
The set temperature of
thermostat is
• excessively high for
cooling.
• excessively low for
heating.
The room temperature is
• excessively low for
cooling.
• excessively high for
heating.
Air outlet and inlet
are blocked.
The filter installed in
the field is clogged
with dust.
Windows and doors are
being opened.
Air outlet and inlet
are blocked.
The set temperature of
thermostat is
• excessively high for
cooling.
• excessively low for
heating.
Insufficient
refrigerant charge.
- 56 -
Remedy
Wait for power supply
recovery.
Contact your
Air conditioning specialist.
Ask your electric power
company.
For temperature control,
• decrease the set
temperature at cooling.
• increase the set
temperature at heating.
Can not be operated as
it is out of temperature
control range.
Remove blocking matter.
Clean it.
Close them.
Remove blocking matter.
For temperature control,
• decrease the set
temperature at cooling.
• increase the set
temperature at heating.
Contact your
Air conditioning specialist.

Hide quick links:

Advertisement

Table of Contents
loading

  Related Manuals for Mitsubishi 10