SERVICING
TABLE OF CONTENTS
Checking Voltage | 30 | |
Checking Wiring | 30 | |
Checking Thermostat, Wiring & Anticipator .. | 30 | |
Thermostat & Wiring | 30 | |
Cooling Anticipator | 31 | |
Heating Anticipator | 31 | |
Checking Encoded Thermostats | 31 | |
Checking Transformer & Control Circuit | 32 | |
Checking Cycle Protector | 32 | |
Checking Time Delay Relay | 32 | |
Checking Contactor and/or Relays | 33 | |
Checking Contactor Contacts | 33 | |
Checking Fan Relay Contact | 33 | |
Copeland Comfort™ Alert Diagnostics | 34 | |
Checking Loss of Charge Protector | 36 | |
Checking Capacitor | 36 | |
Resistance Check | 37 | |
Capacitance Check | 37 | |
Checking Fan & Blower Motor |
| |
| Windings (PSC Motors) | 37 |
Checking Fan & Blower Motor (ECM Motors) 38 | ||
Checking ECM Motor Windings | 41 | |
ECM CFM Adjustments | 41 | |
Checking GE X13™ Motors | 42 | |
Checking Compressor Windings | 43 | |
Resistance Test | 43 | |
Ground Test | 43 | |
Operation Test | 44 | |
Testing Crankcase Heater (optional item) | 44 | |
Checking Reversing Valve Solenoid | 44 | |
Testing Defrost Control | 44 | |
Testing Defrost Thermostat | 45 |
MBR & AR*F Electronic Blower Time Delay.. | 45 | |
MBE & AEPF with Single Speed |
| |
| Air Conditioning | 47 |
MBE & AEPF with Single Speed |
| |
| Heat Pumps | 47 |
Electric Heater (optional item) | 49 | |
Checking Heater Limit Control(S) | 50 | |
Checking Heater Fuse Line | 50 | |
Checking Heater Elements | 50 | |
Refrigeration Repair Practice | 50 | |
Leak Testing | 51 | |
Evacuation | 51 | |
Charging | 52 | |
Checking Compressor Efficiency | 53 | |
Piston Kit Chart | 53 | |
Thermostatic Expansion Valve | 53 | |
Overfeeding | 54 | |
Underfeeding | 54 | |
Superheat | 54 | |
Checking Subcooling | 55 | |
Checking Expansion Valve Operation | 55 | |
Fixed Orifice Restriction Devices | 56 | |
Checking Restricted Liquid Line | 56 | |
RefrigerantOvercharge | 56 | |
56 | ||
Compressor Burnout | 56 | |
Refrigerant Piping | 57 | |
Replacing Reversing Valve | 59 | |
Duct Static Pressure |
| |
| & Static Pressure Drop Across Coils | 59 |
Air Handler External Static | 59 | |
Coil Static Pressure Drop | 60 |
HIGH VOLTAGE!
DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO
DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.
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