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66
No Cooling / Heating
Unit fail to start
Check power supply
- voltage
- phase
- frequency
Check settings of remote control box
Compressor fails to start
Check circuit breake & fuse
Check power source cord
Fan fails to start
Fan Motor Capacitor defective
Loose Connections,
Contactors
Irregular motor resistance (
Ω
)
& insulation (M
Ω
)
Replace Fan Motor
Compressor Motor damaged ( to replace compressor)
Thermostat setting too high
Protection Device Actuated
Reset
Compressor locked (to replace compressor)
Voltage supply not within range
Check motor resistance (
Ω
) and insulation (M
Ω
)
Compressor
Capacitor Defective
Loose Connections,
Improper wiring
Regular but fails
to start
Irregular
For Heat Pump Models
By means of pressure readings :
PRESSURE
PROBABLE CAUSE
Data
Circuit
Too
Low
A Little
Low
Normal
A Little
High
Too
High
High Side
Low Side
=
=
1. Overcharged with refrigerant.
2. Non-condensable gases in refrigerant circuit (e.g. oil).
3. Obstructed air-intake/discharge.
4. Short circuiting of hot air outdoor unit.
High Side
Low Side
=
=
1. Poor compression/no compression (compressor defective.)
2. Check valve stick in open position.
3. Reversing valve leaking.
High Side
Low Side
=
=
1. Undercharged with refrigerant.
2. Refrigerant leakage.
3. Air filter clogged/dirty (indoor unit).
4. Indoor fan locked.
5. Defective defrost control, outdoor coil freeze up (heating).
6. Outdoor fan locked (heating).
High Side
Low Side
=
=
1. Outdoor fan blocked (cooling).
2. Outdoor coil dirty (cooling).
3. Indoor fan locked (heating).
4. Indoor filter clogged/dirty (heating).
5. Non-condensable gases in refrigerant circuit (e.g. air)
High Side
Low Side
=
=
1. Air intake temperature of indoor unit too high.
By Means Of Diagnosis Flow Chart
Generally, there are two kind of problems, i.e. starting failure and insufficient cooling/heating. "Starting Failure" is
caused by electrical defect while "Insufficient Cooling/Heating" is caused by improper application or defects in
refrigerant circuit
.
i) Diagnosis of Electric Circuit
Содержание MCC 010C/CR
Страница 16: ...15 Model MCC050C Model MCC060C...
Страница 26: ...25 Model MCC 060 MLC 060C For export spec with MC Model MCC 060C MLC 060C For local spec...
Страница 27: ...26 Model MCC 060C MMC 060C For export spec with SLM control C3 0BCC...
Страница 28: ...27 Model MCC 010CR 015CR MLC M4LC 010BR 015BR...
Страница 29: ...28 Model MCC 020CR 025CR MLC M4LC 020BR 025BR...
Страница 30: ...29 Model MCC 030CR MLC M4LC 030CR...
Страница 31: ...30 Model MCC 040CR 050CR MLC M4LC 040CR 050CR...
Страница 32: ...31 Model MCC 060CR MLC 060CR...
Страница 33: ...32 Model MCC 060CR MMC 060CR For export spec with SLM control C3 0BCC...
Страница 37: ...36 Model MCC 060C MMC 060C For export spec with SLM control U1 4...
Страница 38: ...37 Model MCC 010 015CR MLC M4LC 010 015BR For export spec with SLM control U1 4...
Страница 39: ...38 Model MCC 020 025CR MLC M4LC 020 025BR For export spec with SLM control U1 4...
Страница 40: ...39 Model MCC 030CR MLC M4LC 030CR For export spec with SLM control U1 4...
Страница 41: ...40 Model MCC 040 050CR MLC M4LC 040 050CR For export spec with SLM control U1 4...
Страница 42: ...41 Model MCC 060CR MLC 060CR For export spec with SLM control U1 4...
Страница 43: ...42 Model MCC 060CR MMC 060CR For export spec with SLM control U1 4...
Страница 46: ...45 Model MLC 020 025BR Heat pump 3 Phase 50Hz 380 415V Model MLC 030CR Heat pump 3 Phase 50Hz 380 415V...
Страница 49: ...48 Low Ambient Unit Optional Outdoor Unit Model MLC 010B 015B 50Hz Outdoor Unit Model MLC 020B 025B 50Hz...