Si30-408 Check Items before Troubleshooting
Troubleshooting 69
2. Check Items before Troubleshooting
2.1 Check Items on Operation Condition (Essential Items as
a Minimum)
Check Items for
Outdoor Unit
Model name of outdoor unit
Outdoor temperature / Suction temperature of the outdoor unit
High pressure
Low pressure
Liquid pressure (Measurement is required)
Compressor discharge pipe temperature
Compressor suction pipe temperature (at the place near the low pressure sensor)
Compressor capacity (* Hz + ON / OFF)
Total capacity with indoor unit operation (with thermostat-ON)
Check Items for
Each Indoor Unit
Model name of indoor unit
Suction temperature (No. 41 on remote controller)
Discharge temperature (Measure with thermometer)
Set flow rate (Check with remote controller)
Liquid pipe temperature (No. 41 on remote controller)
Gas pipe temperature (No. 41 on remote controller)
Opening degree of electronic expansion valve
Other Check
Items
Number of indoor unit connected (Total capacity / Capacity ratio of indoor unit to
outdoor unit)
Approximate piping length, Additional refrigerant charged amount
Frequency of occurrence of abnormality or malfunction
Timing of occurrence of abnormality or malfunction (Time band, etc.)
Operating condition of the room (Number of units in operation or thermostat-ON)
Check the condition by preparing a state that resembles the state which has appeared at
the time of malfunction.
For the troubles occur occasionally or appear when the specified unit is operated, check
the above items in each case of specified unit individual operation, other unit individual
operation and all units operation.
* Check by using the "Operation condition check sheet" (P.108) for eliminating leakage
of check item
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