Midea PH Series, Руководство пользователя

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2. Remove compressor, capillary tube and filter drier from the system.
3. Flush evaporator condenser and all connecting tubing with dry nitrogen or equivalent, to remove
all contamination from system. Inspect suction and discharge line for carbon deposits. Remove and
clean if necessary.
4. Reassemble the system, including new drier strainer and capillary tube.
5. Proceed with processing as outlined under hermetic component replacement.
9.2.5 Rotary compressor special troubleshooting and service
Basically, troubleshooting and servicing rotary compressors is the same as on the reciprocating
compressor with only a few exceptions.
1. Because of the spinning motion of the rotary, the mounts are critical. If vibration is present, check
the mounts carefully.
2. The electrical terminals on the rotary are in a different order than the reciprocating compressors.
The terminal markings are on the cover gasket. Use your wiring diagram to insure correct
connections.
9.2.6 Refrigerant charge
1. The refrigerant charge is extremely critical. It must be measured charge carefully - as exact as
possible to the nameplate charge.
2. The correct method for charging the rotary is to introduce liquid refrigerant into the high side of the
system with the unit off. Then start compressor and enter the balance of the charge, gas only, into
the low side.
The introduction of liquid into the low side, without the use of a capillary tube, will cause damage to
the discharge valve of the rotary compressor.
NOTE: All inoperative compressors returned to Friedrich must have all lines properly plugged with
the plugs from the replacement compressor.
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9.3 Fan motor
A single phase permanent split capacitor motor is used to drive the evaporator blower and condenser
fan. A self-resetting overload is located inside the motor to protect against high temperature and high
amperage conditions.
9.3.1 Fan motor test
1. Determine that capacitor is serviceable.