For Cooling Only Models Or Heat Pump Models (Cooling Cycle)
Diagnosis By Flow Chart
The following chart are efficient checking procedures for troubleshooting when these fan-coil units are
coupled with the condensing units using standard wiring. For dual circuited models, perform the procedures
for each circuit.
No Cooling
No Cooling ( Compresor Does Not Start )
No Voltage or Low Voltage
Unit Power
Supply
Evaporator
Fan Motor
Fuse For
Operation
Circuit
Single-Phase
Components Shorted
Connections Loose
Overcurrent
Relay For
Evaporator Fan
High Voltage or Low Voltage
Single-Phase
Evaporator Fan
Motor Contactor
Coil Burned
Contact Faulty
Get the Right Voltage
Repair the Power Line
Repair or Replace The Components
Tighten The Connections
Get The Right Voltage
Check The Power Supply To The
Motor : Repair When Necessary
Faulty Fan Motor
Defective Operation Switch
Change The Contactor
Repair The Contacts
Repair Or Change The Motor
Repair Or Change The Switch
Condenser
Fan Motor
Overcurrent
Relay For
Condenser Fan
Condenser Fan
Contactor
Compressor
Contactor
High Voltage or Low Voltage
Single-Phase
Coil Burnt
Contact Faulty
Fan Motor Faulty
Other Electrical Component Faulty
Coil Burnt
Contact Faulty
Open Compressor Windings
Incorrect Wiring
Get The Right Voltage
Change The Contactor
Change The Contacts
Repair or Change The Motor
Repair or Change If Necessary
Change The Contactor
Repair The Contacts
Change The Compressor
Correct The Wiring
Running
Stop
Tripped
Faulty
Faulty
Faulty
Tripped
Blown
Running
Faulty
Stop
: Faulty
: Check
: Cause
Remedy
Check The Power Supply To The
Motor : Repair When Necessary
Page 82
Содержание MCM 020 D
Страница 21: ...Refrigerant Circuit MODEL MCM020D MLC M4LC020B MODEL MCM025D MLC M4LC025B MCM030D M4LC030B Page 20...
Страница 23: ...MODEL MCM020DR MLC M4LC020BR MODEL MCM025DR MLC M4LC025BR MCM030DR MLC030BR Page 22...
Страница 41: ...MODEL MLC M4LC061 C CR Page 40...
Страница 42: ...Wiring Diagrams COOLING ONLY INDOOR UNIT MODEL MCM020 025D OUTDOOR UNIT MODEL MLC M4LC020 025B Page 41...
Страница 43: ...INDOOR UNIT MODEL MCM030D OUTDOOR UNIT MODEL MLC030B Page 42...
Страница 44: ...INDOOR UNIT MODEL MCM030D OUTDOOR UNIT MODEL MLC M4LC030C Page 43...
Страница 45: ...INDOOR UNIT MODEL MCM040D OUTDOOR UNIT MODEL MLC035C Page 44...
Страница 46: ...INDOOR UNIT MODEL MCM040 050D OUTDOOR UNIT MODEL MLC M4LC040 050C Page 45...
Страница 47: ...INDOOR UNIT MODEL MCM061 062C OUTDOOR UNIT MODEL M4LC060C Page 46...
Страница 48: ...INDOOR UNIT MODEL MCM061 062C OUTDOOR UNIT MODEL MLC M4LC061C Page 47...
Страница 49: ...HEAT PUMP INDOOR UNIT MODEL MCM020 025DR OUTDOOR UNIT MODEL MLC M4LC020 025BR Page 48...
Страница 50: ...INDOOR UNIT MODEL MCM030DR OUTDOOR UNIT MODEL MLC030BR Page 49...
Страница 51: ...INDOOR UNIT MODEL MCM030DR OUTDOOR UNIT MODEL MLC M4LC030CR Page 50...
Страница 52: ...INDOOR UNIT MODEL MCM040DR OUTDOOR UNIT MODEL MLC035CR Page 51...
Страница 53: ...INDOOR UNIT MODEL MCM040 050DR OUTDOOR UNIT MODEL MLC M4LC040 050CR Page 52...
Страница 54: ...INDOOR UNIT MODEL MCM061 062CR OUTDOOR UNIT MODEL MLC M4LC061CR Page 53...
Страница 55: ...INDOOR UNIT MODEL MCM061 062CR OUTDOOR UNIT MODEL MLC M4LC060CR Page 54...
Страница 61: ...LOW AMBIENT UNIT OPTIONAL OUTDOOR UNIT MODEL MLC010B 015B 50HZ OUTDOOR UNIT MODEL MLC020B 025B 50HZ Page 60...
Страница 63: ...SINGLE PHASE FOR 4HP OUDOOT UNIT MODEL MLC M4LC040C COOLING ONLY MODEL MLC M4LC040CR HEATPUMP Page 62...
Страница 68: ...MCM061 062C Figure C Provide the installation space as shown in Figure D MCM D MCM061 062C Figure D Page 67...
Страница 94: ...2004 McQuay International 1 800 432 1342 www mcquay com ISO 9002 REGISTERED...