SERVICING
29
TABLE OF CONTENTS
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.
S-1
Checking Voltage .......................................... 30
S-2
Checking Wiring ............................................ 30
S-3
Checking Thermostat, Wiring & Anticipator .. 30
S-3A
Thermostat & Wiring ..................................... 30
S-3B
Cooling Anticipator ........................................ 31
S-3C
Heating Anticipator ........................................ 31
S-3D
Checking Encoded Thermostats ................... 31
S-4
Checking Transformer & Control Circuit ....... 32
S-5
Checking Cycle Protector ............................. 32
S-6
Checking Time Delay Relay .......................... 32
S-7
Checking Contactor and/or Relays ................ 33
S-8
Checking Contactor Contacts ....................... 33
S-9
Checking Fan Relay Contact ........................ 33
S-10
Copeland Comfort™ Alert Diagnostics .......... 34
S-11
Checking Loss of Charge Protector ............... 36
S-15
Checking Capacitor ....................................... 36
S-15A Resistance Check ......................................... 37
S-15B Capacitance Check ....................................... 37
S-16A Checking Fan & Blower Motor
Windings (PSC Motors) ............................... 37
S-16B Checking Fan & Blower Motor (ECM Motors) 38
S-16C Checking ECM Motor Windings .................... 41
S-16D ECM CFM Adjustments ................................ 41
S-16E Checking GE X13™ Motors .......................... 42
S-17
Checking Compressor Windings ................... 43
S-17A Resistance Test ............................................ 43
S-17B Ground Test .................................................. 43
S-17D Operation Test .............................................. 44
S-18
Testing Crankcase Heater (optional item) ..... 44
S-21
Checking Reversing Valve Solenoid .............. 44
S-24
Testing Defrost Control .................................. 44
S-25
Testing Defrost Thermostat ........................... 45
S-40
MBR & AR*F Electronic Blower Time Delay .. 45
S-41
MBE & AEPF with Single Speed
Air Conditioning ............................................ 47
S-41A MBE & AEPF with Single Speed
Heat Pumps ................................................. 47
S-60
Electric Heater (optional item) ....................... 49
S-61A Checking Heater Limit Control(S) .................. 50
S-61B Checking Heater Fuse Line ........................... 50
S-62
Checking Heater Elements ........................... 50
S-100
Refrigeration Repair Practice ......................... 50
S-101
Leak Testing ................................................. 51
S-102
Evacuation .................................................... 51
S-103
Charging ........................................................ 52
S-104
Checking Compressor Efficiency .................. 53
S-105A Piston Kit Chart ............................................ 53
S-105B Thermostatic Expansion Valve ...................... 53
S-106
Overfeeding ................................................... 54
S-107
Underfeeding ................................................. 54
S-108
Superheat ..................................................... 54
S-109
Checking Subcooling .................................... 55
S-110
Checking Expansion Valve Operation ........... 55
S-111
Fixed Orifice Restriction Devices .................. 56
S-112
Checking Restricted Liquid Line .................... 56
S-113
Refrigerant Overcharge .................................. 56
S-114
Non-condensables ........................................ 56
S-115
Compressor Burnout ..................................... 56
S-120
Refrigerant Piping .......................................... 57
S-122
Replacing Reversing Valve ............................ 59
S-202
Duct Static Pressure
& Static Pressure Drop Across Coils ............ 59
S-203
Air Handler External Static ........................... 59
S-204
Coil Static Pressure Drop ............................. 60