35
SERVICING TABLE OF CONTENTS
S-1
CHECKING VOLTAGE ................................................ 35
S-2
CHECKING WIRING ................................................... 35
S-3E CTK0*** COMFORTNETTM THERMOSTAT .............. 35
S-4
CHECKING TRANSFORMER
AND CONTROL CIRCUIT ...................................... 48
S-6
CHECKING TIME DELAY RELAY ............................... 48
S-8A CHECKING UNITARY (UC) CONTROL
COMPRESSOR CONTACTOR/RELAY
CONTACTS ............................................................. 48
S-9
CHECKING HIGH AND LOW VOLTAGE
TO ECM MOTOR..........................................................49
S-10A COPELAND COMFORT ALERT™ .............................. 49
S-12 CHECKING HIGH PRESSURE CONTROL ............... 63
S-13 CHECKING LOW PRESSURE CONTROL ................ 63
S-14 CHECKING HIGH AND LOW PRESSURE SWITCH
VOLTAGE ................................................................. 63
S-15 CHECKING CAPACITOR ........................................... 63
S-15A RESISTANCE CHECK USING A DIGITAL
MULTI-METER ......................................................... 63
S-15B CAPACITANCE CHECK USING A DIGITAL
MULTI-METER (IN CAPACITANCE MODE) ............. 64
S-16G CHECKING EMERSON ULTRATECH™
ECM MOTORS ........................................................ 64
S-16H ECM CFM ADJUSTMENTS AVPTC/MBVC ................. 67
S-17 CHECKING COMPRESSOR ..................................... 75
S-17A RESISTANCE TEST ................................................... 75
S-17B GROUND TEST ......................................................... 75
S-17C UNLOADER TEST PROCEDURE ............................ 76
S-17D OPERATION TEST .................................................... 77
S-18 TESTING CRANKCASE HEATER
(OPTIONAL ITEM) ................................................... 77
S-21 CHECKING REVERSING VALVE
AND SOLENOID ..................................................... 77
S-24 TESTING DEFROST CONTROL ................................ 77
S-26 TESTING TEMPERATURE SENSORS
(COMFORTNET READY MODELS ONLY) ............. 78
S-40A AVPTC/MBVC ELECTRONIC
BLOWER/HEATER CONTROL ............................... 78
S-60 ELECTRIC HEATER (OPTIONAL ITEM) .................... 83
S-61A CHECKING HEATER LIMIT CONTROL(S) ................ 84
S-61B CHECKING HEATER FUSE LINK .............................. 84
(OPTIONAL ELECTRIC HEATERS) ....................... 84
S-62 CHECKING HEATER ELEMENTS ............................. 84
S-100 REFRIGERATION REPAIR PRACTICE ..................... 84
S-101 LEAK TESTING
(NITROGEN OR NITROGEN-TRACED) ................ 85
S-102 EVACUATION ............................................................. 85
S-103 CHARGING ................................................................. 86
S-104 CHECKING COMPRESSOR EFFICIENCY ................ 87
S-106 OVERFEEDING .......................................................... 87
S-107 UNDERFEEDING ....................................................... 87
S-108 SUPERHEAT .............................................................. 87
S-109 CHECKING SUBCOOLING ........................................ 87
S-110 CHECKING EXPANSION VALVE OPERATION .......... 88
S-112 CHECKING RESTRICTED LIQUID LINE .................. 88
S-113 OVERCHARGE OF REFRIGERANT .......................... 88
S-114 NON-CONDENSABLES ............................................. 88
S-115 COMPRESSOR BURNOUT ....................................... 91
S-120 REFRIGERANT PIPING ............................................. 91
S-203 SINGLE PIECE AIR HANDLER EXTERNAL
STATIC PRESSURE ............................................ 92
S-203A TWO PIECE AIR HANDLER EXTERNAL
STATIC PRESSURE ............................................ 92
