Important Information - Daikin APGM3 Service And Troubleshooting

IMPORTANT INFORMATION

TRIPLE EVACUATION METHOD (ALTERNATE) ........ 25
CHARGING ................................................................. 25
CHECKING COMPRESSOR EFFICIENCY ................ 25
REFRIGERANT CHARGE CHECK ............................ 25
(UNITS WITH FIXED ORIFICE DEVICES) ................. 25
SUPERHEAT ............................................................... 26
(UNITS WITH TXV DEVICE) ........................................ 26
SUBCOOLING............................................................. 26
THERMOSTATIC EXPANSION VALVE ....................... 27
OVERFEEDING .......................................................... 27
UNDERFEEDING ........................................................ 27
CHECKING EXPANSION VALVE OPERATION .......... 30
FIXED ORIFICE RESTRICTOR DEVICES ................. 30
CHECKING RESTRICTED LIQUID LINE .................... 30
OVERCHARGE OF REFRIGERANT .......................... 30
NON-CONDENSABLES .............................................. 31
COMPRESSOR BURNOUT ........................................ 31
CHECKING EXTERNAL STATIC PRESSURE ............ 31
AIRFLOW ADJUSTMENTS ......................................... 32
CHECKING TEMPERATURE RISE ............................ 33
TESTING PRIMARY LIMIT CONTROL ....................... 33
TESTING AUXILIARY LIMIT ...................................... 34
CHECKING FLAME ROLLOUT SWITCH ................... 34
TESTING INDUCER MOTOR ..................................... 35
TESTING GAS VALVE ................................................ 36
CHECKING MAIN BURNERS ..................................... 36
CHECKING ORIFICES ................................................ 36
CHECKING GAS PRESSURE .................................... 37
CHECKING FOR DELAYED IGNITION ...................... 38
CHECKING FOR FLASHBACK ................................... 38
CHECKING PRESSURE CONTROL .......................... 38
HIGH ALTITUDE APPLICATION ................................. 39
TESTING IGNITION CONTROL MODULE ................ 39
CHECKING FLAME SENSOR .................................... 42
BLOWER PERFORMANCE DATA .................................. 43
TROUBLESHOOTING .................................................... 51
MAINTENANCE .............................................................. 56
WIRING DIAGRAMS ....................................................... 57
(Not a technical assistance line for dealers.) Your telephone company will bill you for the call.
IMPORTANT NOTICES
RECOGNIZE SAFETY SYMBOLS, WORDS AND
LABELS
OUTSIDE THE U.S., call 1-713-861-2500.
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.
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.
This unit should not be connected to, or used 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 conditions may
result from the use of devices that have not been approved
or certified by the manufacturer.
WARNING
WARNING
WARNING
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