Maytag Amana PMH Series Service And Troubleshooting page 38

Package terminal air conditioner/heatpump
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SERVICING
Com plaint
POSSIBLE CAUSE
DOTS IN ANALYSIS
GUIDE INDICATE
"POSSIBLE CAUSE"
Pow er Failure
Blow n Fuse
Loose Connection
Shorted or Broken Wires
Open Overload
Faulty Therm ostat
Shorted or Open Capacitor
Internal Overload Open
Shorted or Grounded Com pressor
Com pressor Stuck
Open Control Circuit
Low Voltage
Faulty Evap or Cond. Fan Motor
Shorted or Grounded Fan Motor
Shortage or Refrigerant
Restructed Liquid Line
Dirty Air Filter
Dirty Indoor Coil
Airflow Across Coils
Overcharge of Refrigerant
Dirty Outdoor Coil
Noncondensibles
Recirculation of Condensing Air
Infiltration of Outdoor Air
Im properly Located Therm ostat
System Undersized
Broken Internal Parts
Broken Values
Inefficient Com pressor
Unsatisfactory
No Heat
• •
• • • • • •
• •
• •
• •
• •
• •
• •
• •
• •
System
Operating
Cooling
Pressures
Test Voltage
Im pact Fuse Size & Type
Inspect Connection - Tighten
Test Circuits With Ohm m eter
Test Continuity of Overloads
Test Continuity of Therm ostat & Wiring
Test Capacitor
Test Continuity of Overload
Test Motor Windings
Use Test Cord
Test Control Circuit w ith Voltm eter
Test Voltage
Repair or Replace
Test Motor Windings
• •
Test for Leaks, Replace Drier
• •
Replace Restricted Part
• •
Inspect Filter - Clean or Replace
• •
Inspect Coil - Clean
Check Motor Operation
• •
Recover & Replace Cap Tube
Inspect Coil - Clean
Rem ove Charge, Replace Cap Tube
Rem ove Obstruction to Air Flow
• •
Check Window s, Doors, Vent Fans, etc.
Relocate Therm ostat
Refigure Cooling Load
Replace Com pressor
Test Com pressor Efficiency
• •
Test Com pressor Efficiency
Test Method
Remedy
S-1
S-2
S-3
S-17A
S-3
S-15
S-6
S-17
S-17
S-1
S-1
S-16
S-16
S-1, S-2
S-116
S-1, S-2
S-17
S-104
S-104
38

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