Service Instructions

SERVICING
82
TABLE OF CONTENTS
SERVICING ...........................................................................82
S-1 CHECKING VOLTAGE ............................................. 83
S-2 CHECKING WIRING ............................................... 83
S-3 CHECKING THERMOSTAT AND WIRING .............. 83
S-3A THERMOSTAT WIRING........................................... 83
S-4 CHECKING TRANSFORMER AND CONTROL
CIRCUIT.................................................................. 83
S-7 CHECKING CONTACTOR AND/OR RELAYS ......... 83
S-8 CHECKING CONTACTOR CONTACTS .................. 83
S-9 CHECKING FAN RELAY CONTACTS ..................... 85
S-10 MBR/AR*F ELECTRONIC
BLOWER TIME DELAY RELAY ............................ 86
S-11 CHECKING LOSS OF CHARGE PROTECTOR ..... 86
S-12 CHECKING HIGH PRESSURE CONTROL ........... 86
S-13 CHECKING LOW PRESSURE CONTROL ............ 86
S-10 COPELAND COMFORT ALERT™ .......................... 87
S-10B COPELAND CORESENSE™ .................................87
S-15 CHECKING CAPACITOR ........................................ 93
S-15A RESISTANCE CHECK USING A DIGITAL MULTI-
METER .................................................................... 93
S-15B CAPACITANCE CHECK USING A DIGITAL
MULTI-METER (IN CAPACITANCE MODE) ......... 93
S-16A CHECKING FAN AND BLOWER
MOTOR WINDINGS (PSC MOTORS) ................. 94
S-16B CHECKING FAN AND BLOWER MOTOR
(ECM MOTORS) .................................................. 94
S-16C CHECKING ECM MOTOR WINDINGS ................... 95
S-16D ECM CFM ADJUSTMENTS MBE / AEPF ................. 95
S-16E BLOWER PERFORMANCE DATA ........................... 99
S-16F CHECKING HIGH EFFICIENCY MOTORS............. 99
S-16G EEM BLOWER REPLACEMENT ..........................100
S-17 CHECKING COMPRESSOR ................................101
S-17A RESISTANCE TEST ..............................................100
S-17B GROUND TEST .................................................... 102
S-17C UNLOADER TEST PROCEDURE ........................102
S-17D OPERATION TEST ................................................103
S-17E CHECKING 3-PHASE SCROLL COMPRESSOR
ROTATION....................................................................103
S-18 TESTING CRANKCASE HEATER
(OPTIONAL ITEM) ..............................................104
S-21 CHECKING REVERSING VALVE
AND SOLENOID ................................................104
S-24 TESTING DEFROST CONTROL ..........................104
S-25 TESTING DEFROST THERMOSTAT ....................104
S-50 CHECKING HEATER LIMIT CONTROL(S)........... 110
S-52 CHECKING HEATER ELEMENTS ........................ 110
S-60 ELECTRIC HEATER (OPTIONAL ITEM) ............... 110
S-61A CHECKING HEATER LIMIT CONTROL(S)........... 111
S-61B CHECKING HEATER FUSE LINK ........................ 111
(OPTIONAL ELECTRIC HEATERS) ...................... 111
S-62 CHECKING HEATER ELEMENTS ........................ 112
S-100 REFRIGERATION REPAIR PRACTICE ................ 112
S-101 LEAK TESTING
(NITROGEN OR NITROGEN-TRACED) ............. 112
S-102 EVACUATION ........................................................ 112
S-103 CHARGING ........................................................... 113
S-104 CHECKING COMPRESSOR EFFICIENCY .......... 114
S-106 OVERFEEDING..................................................... 115
S-107 UNDERFEEDING ................................................. 115
S-108 SUPERHEAT ......................................................... 115
S-109 CHECKING SUBCOOLING .................................. 118
S-110 CHECKING EXPANSION VALVE OPERATION ......... 118
S-112 CHECKING RESTRICTED LIQUID LINE............. 118
S-113 OVERCHARGE OF REFRIGERANT ..................... 118
S-114 NON-CONDENSABLES ....................................... 119
S-115 COMPRESSOR BURNOUT ................................. 119
S-120 REFRIGERANT PIPING........................................120
S-201 CLEANING ALUMINUM COILS ................................120
S-202 DUCT STATIC PRESSURES
AND/OR STATIC PRESSURE DROP
ACROSS COILS ................................................120
S-203 SINGLE PIECE AIR HANDLER
EXTERNAL STATIC............................................120
S-203A TWO PIECE AIR HANDLER
EXTERNAL STATIC PRESSURE ......................120
S-204 COIL STATIC PRESSURE DROP .........................121
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.