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SERVICING
34
HIGH VOLTAGE!
Disconnect ALL power before servicing or installing. Multiple power sources may be present. Failure to
do so may cause property damage, personal injury or death.
S-1 Checking Voltage .......................................... 35
S-2 Checking Wiring............................................ 35
S-3 Checking Thermostat, Wiring & Anticipator .. 35
S-3A Thermostat & Wiring ..................................... 35
S-3B Cooling Anticipator ........................................ 36
S-3C Heating Anticipator........................................ 36
S-3D Checking Encoded Thermostats ................... 36
S-4 Checking Transformer & Control Circuit ....... 37
S-5 Checking Cycle Protector ............................. 37
S-6 Checking Time Delay Relay .......................... 37
S-7 Checking Contactor and/or Relays................ 38
S-8 Checking Contactor Contacts ....................... 38
S-9 Checking Fan Relay Contact ........................ 38
S-10 Copeland Comfort™ Alert Diagnositics ......... 39
S-11 Checking Loss of Charge Protector............... 41
S-12 Checking High Pressure Control ................... 41
S-13 Checking Low Pressure Control .................... 41
S-15 Checking Capacitor ....................................... 41
S-15A Resistance Check......................................... 42
S-15B Capacitance Check ....................................... 42
S-16A Checking Fan & Blower Motor
Windings (PSC Motors) ............................... 43
S-16B Checking Fan & Blower Motor (ECM Motors) 43
S-16C Checking ECM Motor Windings .................... 46
S-16D ECM CFM Adjustments ................................ 46
S-16E Blower Performance Data .............................. 48
S-16F Checking GE X13™ Motors .......................... 48
S-17 Checking Compressor Windings ................... 49
S-17A Resistance Test ............................................ 49
S-17B Ground Test .................................................. 49
S-17C Unloader Test ................................................ 50
S-17D Operation Test .............................................. 50
S-18 Testing Crankcase Heater (optional item) ..... 51
S-21 Checking Reversing Valve and Solenoid........ 51
S-24 Testing Defrost Control .................................. 51
S-25 Testing Defrost Thermostat ........................... 51
S-26 Checking Heater Limit Control(s) .................. 52
S-27 Checking Heater Elements ............................... 52
S-40 MBR/ARUF Electronic Blower Time Delay
with Single Stage Air Conditioners
& Heat Pumps .................................................. 52
S-41 MBE/AEPF with GSX, SSX, ASX, DSX
Air Conditioners ................................................ 54
S-41A MBE/AEPF with GSZ, SSZ, ASZ
Heat Pumps ...................................................... 55
S-60 Electric Heater (optional item) ........................... 58
S-61A Checking Heater Limit Control(S) ...................... 59
S-61B Checking Heater Fuse Line ............................... 59
S-62 Checking Heater Elements ............................... 59
S-100 Refrigeration Repair Practice ............................. 60
S-101 Leak Testing ..................................................... 60
S-102 Evacuation ........................................................ 60
S-103 Charging ............................................................ 61
S-104 Checking Compressor Efficiency ...................... 62
S-105A Piston Chart - ASX13, GSX13, SSX14,
ASX14, ASZ13, GSZ13 Units ............................ 63
S-105B Thermostatic Expansion Valve .......................... 63
S-106 Overfeeding ....................................................... 66
S-107 Underfeeding ..................................................... 66
S-108 Superheat ......................................................... 66
S-109 Checking Subcooling ........................................ 66
S-109A Two Speed Application ...................................... 67
S-109B Heat Pump Heating Mode ................................. 67
S-110 Checking Expansion Valve Operation ............... 67
S-111 Fixed Orifice Restriction Devices ...................... 67
S-112 Checking Restricted Liquid Line ........................ 68
S-113 Refrigerant Overcharge ...................................... 68
S-114 Non-condensables ............................................ 68
S-115 Compressor Burnout ......................................... 68
S-120 Refrigerant Piping .............................................. 69
S-202 Duct Static Pressure
& Static Pressure Drop Across Coils ................ 71
S-203 Air Handler External Static ............................... 71
S-204 Coil Static Pressure Drop ................................. 72