SERVICING
29
SERVICING TABLE OF CONTENTS
S-1
CHECKING VOLTAGE ............................................... 30
S-2
CHECKING WIRING .................................................. 30
S-3E
CTK0*** COMFORTNET
TM
THERMOSTAT ............... 30
S-6
CHECKING TIME DELAY RELAY ............................... 43
S-8A
CHECKING UNITARY (UC) CONTROL
COMPRESSOR CONTACTOR/RELAY
CONTACTS ............................................................ 43
S-9
CHECKING HIGH AND LOW VOLTAGE
TO ECM MOTOR ................................................... 44
S-10A
COPELAND COMFORT ALERT
TM
- ........................... 44
UNITARY (UC) CONTROL DIAGNOSTICS ............ 44
S-12
CHECKING HIGH PRESSURE CONTROL ............... 59
S-13
CHECKING LOW PRESSURE CONTROL ............... 59
S-14
CHECKING HIGH AND
LOW PRESSURE SWITCH VOLTAGE .................. 59
S-15
CHECKING CAPACITOR ........................................... 59
S-15A
RESISTANCE CHECK USING A
DIGITAL MULTI-METER .......................................... 59
S-15B
CAPACITANCE CHECK USING A
DIGITAL MULTI-METER
(IN CAPACITANCE MODE) .................................... 60
S-16G
CHECKING EMERSON
ULTRATECH
TM
ECM MOTORS .............................. 60
S-16H
ECM CFM ADJUSTMENTS DVPTC/MBVC ................ 63
S-17
CHECKING COMPRESSOR ..................................... 68
S-17A
RESISTANCE TEST .................................................. 68
S-17B
GROUND TEST ......................................................... 68
S-17C
UNLOADER TEST PROCEDURE ............................ 69
S-17D
OPERATION TEST .................................................... 69
S-18
TESTING CRANKCASE HEATER
(OPTIONAL ITEM) .................................................. 70
S-21
CHECKING REVERSING VALVE AND SOLENOID .... 70
S-24
TESTING DEFROST CONTROL .............................. 70
S-26
TESTING TEMPERATURE SENSORS
(COMFORTNET READY MODELS ONLY) ............ 71
S-40A
DVPTC/MBVC ELECTRONIC
BLOWER/HEATER CONTROL ............................. 71
S-60
ELECTRIC HEATER (OPTIONAL ITEM) .................... 76
S-61A
CHECKING HEATER LIMIT CONTROL(S) ................ 77
S-61B
CHECKING HEATER FUSE LINK .............................. 77
(OPTIONAL ELECTRIC HEATERS) ........................... 77
S-62
CHECKING HEATER ELEMENTS ............................. 77
S-100
REFRIGERATION REPAIR PRACTICE ..................... 77
S--101
LEAK TESTING
(NITROGEN OR NITROGEN-TRACED) ................ 78
S-102
EVACUATION ............................................................. 78
S-103
CHARGING ................................................................ 79
S-104
CHECKING COMPRESSOR EFFICIENCY ............... 80
S-106
OVERFEEDING ......................................................... 80
S-107
UNDERFEEDING ....................................................... 80
S-108
SUPERHEAT ............................................................. 80
S-109
CHECKING SUBCOOLING ........................................ 81
S-110
CHECKING EXPANSION VALVE OPERATION .......... 81
S-112
CHECKING RESTRICTED LIQUID LINE ................... 81
S-113
OVERCHARGE OF REFRIGERANT ......................... 82
S-114
NON-CONDENSABLES ............................................ 82
S-115
COMPRESSOR BURNOUT ...................................... 85
S-120
REFRIGERANT PIPING ............................................. 85
S-203
SINGLE PIECE AIR HANDLER
EXTERNAL STATIC PRESSURE ........................... 86
S-203A TWO PIECE AIR HANDLER
EXTERNAL STATIC PRESSURE ........................... 86