ASPT Service Manual

IMPORTANT INFORMATION
2
IMPORTANT NOTICES FOR CONSUMERS
AND SERVICERS
RECOGNIZE SAFETY SYMBOLS, WORDS AND
LABELS
WARNING
THIS UNIT SHOULD NOT BE CONNECTED TO, OR USID IN
CONJUNCTION WITH, ANY DEVICES THAT ARE NOT DESIGN
CERTIFIED FOR USE WITH THIS UNIT OR HAVE NOT BEEN
TESTED AND APPROVED BY THE MANUFACTURER. SERIOUS
PROPERTY DAMAGE OR PERSONAL INJURY, REDUCED UNIT
PERFORMANCE AND/OR HAZARDOUS CONDITOINS MAY RESULT
FROM THE USE OF DEVICES THAT HAVE NOT BEEN APPROVED
OR CERTIFIED BY THE MANUFACTURER.
WARNING
TO PREVENT THE RISK OF PROPERTY DAMAGE, PERSONAL
INJURY, OR DEATH, DO NOT STORE COMBUSTIBLE MATERIALS
OR USE GASOLINE OR OTHER FLAMMABLE LIQUIDS OR
VAPORS IN THE VICINITY OF THIS APPLIANCE.
WARNING
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.
CHECKING ECM MOTOR WINDINGS ........................ 78
ECM CFM ADJUSTMENTS MBE/AEPF .....................78
BLOWER PERFORMANCE DATA ..............................83
CHECKING HIGH EFFICIENCY MOTORS .................83
EEM BLOWER REPLACEMENT .................................84
MBR/AR*F ELECTRONIC BLOWER TIME DELAY
RELAY ..........................................................................85
CHECKING COMPRESSOR ........................................85
RESISTANCE TEST ..................................................... 86
GROUND TEST ...........................................................86
UNLOADER TEST PROCEDURE ..............................87
OPERATION TEST.......................................................87
CHECKING 3-PHASE SCROLL COMPRESSOR
ROTATION ...................................................................88
TESTING CRANKCASE HEATER
(OPTIONAL ITEM) ......................................................88
CHECKING REVERSING VALVE AND SOLENOID ....88
TESTING DEFROST CONTROL .................................89
TESTING DEFROST THERMOSTAT ...........................89
CHECKING HEATER LIMIT CONTROL(S) ..................89
CHECKING HEATER ELEMENTS ............................... 90
ELECTRIC HEATER (OPTIONAL ITEM) .....................90
CHECKING HEATER LIMIT CONTROL(S) ..................91
CHECKING HEATER ELEMENTS ............................... 91
REFRIGERATION REPAIR PRACTICE ....................... 91
LEAK TESTING
(NITROGEN OR NITROGEN-TRACED) ...................... 92
EVACUATION ...............................................................92
CHARGING ..................................................................93
CHECKING COMPRESSOR EFFICIENCY .................94
OVERFEEDING ...........................................................94
UNDERFEEDING ......................................................... 95
CHECKING SUPERHEAT ............................................ 95
SUBCOOLING ON EXPANSION VALVE SYSTEM......96
CHECKING EXPANSION VALVE OPERATION ........... 96
CHECKING RESTRICTED LIQUID LINE .....................96
OVERCHARGE OF REFRIGERANT ...........................96
NON-CONDENSABLES ............................................... 99
COMPRESSOR BURNOUT ......................................... 99
REFRIGERANT PIPING .............................................100
DUCT STATIC PRESSURES .....................................100
SINGLE PIECE AIR HANDLER EXTERNAL STATIC 100
TWO PIECE AIR HANDLER EXTERNAL STATIC
PRESSURE ................................................................ 100
FURNACE EXTERNAL STATIC PRESSURE ............101
PERIODIC MAINTENANCE .......................................101
WIRING DIAGRAMS ......................................................103