McQuay M5HDC Spezifikationen PDF herunterladen (Seite 38)

M5HDC-2010

Troubleshooting

By means of diagnostic ow chart:

No Cooling

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.

: Faulty : Check : Cause : Remedy

No Cooling ( Compresor Does Not Start )

Evaporator

Fan Motor

Unit Power

Supply

No Voltage or Low Voltage

Single Phase

Components Shorted

Connections Loose

High or Low Voltage

Single Phase

Coil Burnt

Contact Faulty

Open Compressor Windings

Incorrect Wiring

Correct The Wiring

Change The Compressor

Change The Contacts

Change The Contactor

Get The Right Voltage

Tighten The Connections

Repair or Replace The Components

Repait The Power Line

Repair Or Replace The Switch

Repair Or Change The Motor

Repair The Contacts

Change The Contactor

Check The Power Supply To The

Motor : Repair When Necessary

Check The Power Supply To The

Motor : Repair When Necessary

Repair or Change If Necessary

Repair or Change The Motor

Change The Contacts

Faulty Fan Motor

Fan Motor Faulty

Other Electrical Component Faulty

Defective Operation Switch

High Voltage or Low Voltage

Single Phase

Coil Burnt

Fuse For

Operation

Circuit

Overcurrent

Relay For

Evaporator Fan

Contactor

Overcurrent

Relay For

Condenser Fan

Contactor

Compressor

Contactor

Condenser

Fan Motor

Stop

Tripped

Faulty

Running

Stop

Faulty

Blown

Tripped

Faulty

Running

1 2 ... 33 34 35 36 37 38 39 40 41 42 43 44

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