121
The following charts are efficient checking procedures for troubleshooting when these fan-coil units are
combined with condensing units with the unit standard wiring. For dual circuited models, perform the
procedures for each.
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
Contactor
Coil Burnt
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 Replace 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
Check The Power Supply To The
Motor : Repair Connections When
Necessary
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
Содержание M4MC075D
Страница 71: ...70 Blower Performance Curves BLOWER PERFORMANCE CURVE MDB 075D...
Страница 72: ...71 BLOWER PERFORMANCE CURVE MDB 100D...
Страница 73: ...72 BLOWER PERFORMANCE CURVE MDB 125D...
Страница 74: ...73 BLOWER PERFORMANCE CURVE MDB 150D...
Страница 75: ...74 BLOWER PERFORMANCE CURVE MDB 200D...
Страница 76: ...75 BLOWER PERFORMANCE CURVE MDB 250D L s 70 65 60...
Страница 77: ...76 BLOWER PERFORMANCE CURVE MDB 300D...
Страница 78: ...77 BLOWER PERFORMANCE CURVE MDB 400D...
Страница 79: ...78 BLOWER PERFORMANCE CURVE MDB 500D...
Страница 80: ...79 BLOWER PERFORMANCE CURVE MDB 075D DR VERY HIGH STATIC...
Страница 81: ...80 BLOWER PERFORMANCE CURVE MDB 100D DR VERY HIGH STATIC...
Страница 82: ...81 BLOWER PERFORMANCE CURVE MDB 125D DR VERY HIGH STATIC...
Страница 83: ...82 BLOWER PERFORMANCE CURVE MDB 150D DR VERY HIGH STATIC...
Страница 89: ...88 MODEL MDB 500D4 DR4 NOTE 1 WITH SEQUENTIAL CONTROLLER 2 VERTICAL AIR DISCHARGE...
Страница 90: ...89 Outlines And Dimensions Outdoor MODEL MMC 075 100D DR MODEL MDB 125D DR...
Страница 91: ...90 MODEL MMC 150D DR OUTDOOR UNIT WITH BALL VALVE MODEL MMC 075D...
Страница 92: ...91 MODEL MMC 100D MODEL MMC 125D...
Страница 93: ...92 MODEL MMC 150D...
Страница 97: ...96 MODEL MDB 400D4 vs MMC 100D x 4 MDB 500D4 vs MMC 125D x 4 WITH SEQUENTIAL CONTROLLER...
Страница 99: ...98 MODEL MDB 125DR vs MMC 125DR WITH U1 125 SLM3 HANDSET MODEL MDB 150DR vs MMC 150DR WITH U1 125 SLM3 HANDSET...
Страница 101: ...100 MODEL MDB 400DR4 vs MMC 100DR x 4 MDB 500DR4 vs MMC 125DR x 4 WITH SEQUENTIAL CONTROLLER...
Страница 102: ...101 Refrigerant Circuit Diagram MODEL MMC 075D 100D 125D 150D...
Страница 103: ...102 MODEL MLC 061C...
Страница 104: ...103 MODEL MMC 075DR 100DR 125DR 150DR R22 M4MC 75DR 100DR 125DR 150DR R407C...
Страница 177: ...2004 McQuay International 1 800 432 1342 www mcquay com ISO 9002 REGISTERED...