Installation guide

TROUBLESHOOTING (CONT.)
[
I COMPRESSOR iWILL NOT RUN
I
[ ]
__{ DEFECTIVE
LOW-VOLTAGE
TRANSFORMER
_{_ OPEN CONTROL ]CIRCUIT
_-[ LOSS OF CHARGE ]
_[_ LOOSE
ELECTRICAL
CONNECTION
g COMPRESSOR ]
POWER SUPPLY
OPEN
_ LOOSE LEADS AT ]COMPRESSOR
FAULTY STARTGEAR (!-PH)
_[ OPEN, SHORTED,
OR GROUNDED
COMPRESSOR
MOTOR
WINDINGS
q COMPRESSORSTUCK
__ COMPRESSOR
INTERNAL
PROTECTION
OPEN
--_ DEFECTIVE RUN ]CAPACffOR
NO COOLING OR ]
INSUFFiCiENT
COOUNG
I
t
COMPRESSOR
RUNS BUT
CYCLES ON
INTERNAL
OVERLOAD
OUTDOOR FAN
STOPPED OR
CYCUNGON
OVERLOAD
OUTDOOR AIR 1
RESTRICTED OR
RECIRCULATING
DAMAGED OR
STUCK
REVERSING
VALVE
_{ RESTRICTEDDISCHARGE TUBE
--_ LOOSE LEAD AT IFAN MOTOR
DEFROST RELAYS ]
NC CONTACTS
OPEN
_[ MOTORDEFECTIVE
_{INOORRECT OFM ]CAPACITOR
£
LOW SUCTION 1
PRESSURE
_-[ DIRTY AIR
FILTERS
-_ DUCTRESTRICTED
--_ DAMPERS }PARTLY CLOSED
l
COMPRESSOR
RUNS BUT
INSUFFICIENT
COOLING
l HIGH SUCTION
LOW READ
PRESSURE
__[
_{ REVERSING
VALVE HUNG UP
OR INTERNAL
LEAK
DEFECTIVE
COMPRESSOR
VALVES
1
I RIGRSUOT'ON1LOW SUPERHEAT
__]
[_ UNIT
OVERCHARGED 1
1 iNCORRECT 1
ACCURATER
PISTON
iNTERNAL 1
PRESSURE
RELIEF OPEN
___ OVERCHARGE
OR NON-
CONDENSABLES
IN SYSTEM
LOW
REFRIGERANT
CHARGE
_{_ LINE VOLTAGE
TOO HIGH OR
LOW
__{ DEFECTIVE
DEFPOST
THERMOSTAT
DEFECTIVE RUN t
CAPAC_OR
,_ COMPRESSOR ]
BEARINGS
=¢ULTY
INDOOR COIL ]FROSTED
___ LIQUID LINE ]
SLIGHTLY
RESTRICTED
__ ACCURATER®
RESTRICTED
_[ INCORRECT I
ACCURATER
PISTON
__ INDOOR COIL _
STRAINER
RESTRICTED
LEGEND
NC -- Normally Closed
ODT -- Outdoor Thermostat
NOTE: For systems with indoor units equipped with microprocessor
control, see separate controls, service, and troubleshooting manual.
INDOOR BLOWER l
MOTOR
DEFECTIVE OR
CYCLING ON
OVERLOAD
Fig. 12 - Troubleshooting the Heating Cycle
A07436
15