Service manual

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Check on refrigerant piping
(V3055)
Check on amount of refrigerant
charge
Check the below items.
2Power wiring
2Control transmission wiring
between units
2Earth wire
 Is the wiring performed as specified?
 Are the designated wires used?
 Is the grounding work completed?
Use a 500V megger tester to measure the insulation.
2Do not use a megger tester for other circuits than 200V (or 240v)
circuit.
 Are the setscrews of wiring not loose?
 Is pipe size proper? (The design pressure of this product is
3.8MPa.)
 Are pipe insulation materials installed securely?
Liquid and gas pipes need to be insulated. (Otherwise causes
water leak.)
 Are respective stop valves on liquid, gas and oil equalizing lines
securely open?
 Is refrigerant charged up to the specified amount?
If insufficient, charge the refrigerant from the service port of stop
valve on the liquid side with outdoor unit in stop mode after turning
power on.
 Has the amount of refrigerant charge been recorded on “Record
Chart of Additional Refrigerant Charge Amount”?
 Be sure to turn the power on 6 hours before starting operation to
protect compressors. (to power on clankcase heater)
 For field settings, refer to “Field Settings” on and after P95.
After the completion of field settings, set to “Setting mode1”
Turn outdoor unit power on.
Turn outdoor unit power on.
Carry out field setting on
outdoor PC board.
(V3056)