Specifications

51
Complaint
POSSIBLE CAUSE
DOTS IN ANALYSIS
GUIDE INDICATE
"POSSIBLE CAUSE"
SYMPTOM
System Will Not Start Compressor will not start - fan runs Compressor and Condenser Fan will not start Evaporator fan will not start Condenser fan will not start Compressor runs - goes off on overload Compressor cycles on overload System runs continuously - little cooling Too cool and then too warm Not cool enough on warm days Certain areas too cool others, too warm Compressor is noisy Low suction pressure Low head pressure High Suction Pressure High head pressure
Power Failure
•
Test Voltage S-1
Blown Fuse
•••
Impact Fuse Size & Type
Loose Connection
•••
Inspect Connection - Tighten S-2
Shorted or Broken Wires
••••••
Test Circuits With Ohmmeter S-3
Open Overload
•• ••
Test Continuity of Overloads S-17A
Faulty Thermostat
•• •
Test Continuity of Thermostat & Wiring S-3
Shorted or Open Capacitor
•••
Test Capacitor S-15
Internal Overload Open
•
Test Continuity of Overload S-6
Shorted or Grounded Compressor
••
Test Motor Windings S-17
Compressor Stuck
••
Use Test Cord S-17
Open Control Circuit
•
Test Control Circuit with Voltmeter S-1
Low Voltage
•••
Test Voltage S-1
Faulty Evap or Cond. Fan Motor
••
Repair or Replace S-16
Shorted or Grounded Fan Motor
••
Test Motor Windings S-16
Shortage or Refrigerant
•• ••
Test for Leaks, Replace Drier S-1, S-2
Restructed Liquid Line
•• ••
Replace Restricted Part
Dirty Air Filter
•••• •
Inspect Filter - Clean or Replace
Dirty Indoor Coil
•••• •
Inspect Coil - Clean
Too Much Air across Indoor Coil
•
Reduce Blower Speed
Overcharge of Refrigerant
•• ••
Recover & Replace Cap Tube S-116
Dirty Outdoor Coil
•• • •
Inspect Coil - Clean
Noncondensibles
•• •
Remove Charge, Replace Cap Tube S-1, S-2
Recirculation of Condensing Air
•• •
Remove Obstruction to Air Flow
Infiltration of Outdoor Air
•••
Check Windows, Doors, Vent Fans, etc.
Improperly Located Thermostat
••
Relocate Thermostat
System Undersized
••
Refigure Cooling Load
Broken Internal Parts
•
Replace Compressor S-17
Broken Values
•
Test Compressor Efficiency S-104
Inefficient Compressor
•••
Test Compressor Efficiency S-104
No Heat
Unsatisfactory
Cooling
System
Operating
Pressures
Test Method
Remedy
See Service Procedure Reference