Carrier 38GC - Manual (Page 12)

TROUBLESHOOTING CHART
Condenser Fan On
Condenser Air Restricted
Condenser Air Recirculating
Noncondensables in System
Refrigerant Overcharge
Improper Line Voltage
Refrigerant System Restriction
Loose Electric Connections
Faulty Run Capacitor
Condenser Fan Off
Fan Slipping on Shaft
Loose Electric Connections
Fan Motor Overload Open
Fan Motor Bearings Stuck
Fan Motor Defective
Low Suction Pressure
Low Refrig Charge
Defective Low-Pressure Switch
No Power at Open Contactor
Low-Pressure Switch Setting Blown Fuses
High Suction Pressure Power Failure
Low Head Pressure Power at Open Contactor
Defective Compressor Valves Faulty Control Relay
Slightly Low Suction Pressure Holding Coi 1 Open
Dirty Filters Internal Compr Overload Open
Partially Restricted Air Flow Low-Pressure Cutout Open
Coil Partially Iced Overloads Cycled
Slightly Low on Refrigerant Compressor Stuck
Duct Restricted Faulty Run Capacitor
Dampers Partially Closed High Head Pressure
Evaporative Fan Running
Low Refrig Charge
Restricted Refrig Flow
Restricted Capillary
Defective TXV
Restricted Evaporator Air
iced Coil
Plugged Filter
Dampers Closed
Restricted Ductwork
Evaporator Fan Stopped
Defective Fan Relay
Loose Leads
Overload Open
Burned Out Motor
Broken Belt____________
Contactor Open
Dead Tronsformer
Thermostat Circuit Open
Faulty Control Relay
Overload Open
Low-Pressure Switch Open
Contactor Coil Open
Loose Connection
Contactor Closed
Loose Leads at Compressor
Loose Leads at Contactor
Motor Windings Open
Internal Compr Overload Open
Contactor Closed Then Opens
Overload Opens
Compressor Stuck
For replacement items use Carrier specified parts.
Manufacturer reserves the right to change any product specifications without notice.
C A R R I E R A I R C O N D I T I O N I N G C O M P A N Y • S Y R A C U S E , N E W Y O R K
Tab 4 Form 38GC-15SI New Printed in U.S.A. 2-71 Codes D and MS Catalog No. 533-802