Bryant R-22 service manual Heat Pump Troubleshooting Heating Cycle, A90206

HEAT PUMP

TROUBLESHOOTING HEATING CYCLE

NO HEATING OR

INSUFFICIENT

HEATING

COMPRESSOR WILL NOT RUN

COMPRESSOR

RUNS BUT

CYCLES ON

INTERNAL

OVERLOAD

COMPRESSOR

RUNS

INSUFFICIENT

HEATING

CONTACT

OPEN

DEFECTIVE LOW-

VOLTAGE

TRANSFORMER

REMOTE

CONTROL

CENTER

DEFECTIVE

CONTACTOR

COIL OPEN OR

SHORTED

OPEN INDOOR THERMOSTAT

LIQUID-LINE PRESSURE SWITCH OPEN

LOSS OF

CHARGE

OPEN CONTROL

CIRCUIT

CONTACTOR

CLOSED

COMPRESSOR POWER SUPPLY

LOOSE LEADS AT

COMPRESSOR

FAULTY START

GEAR (1-PH)

COMPRESSOR

STUCK

COMPRESSOR

INTERNAL

OVERLOAD

OPEN

OPEN SHORTED OR GROUNDED COMPRESSOR WINDINGS

DEFECTIVE RUN

CAPACITOR

DEFECTIVE

START

CAPACITOR

DIRTY FILTERS

OR INDOOR

COIL

INDOOR FAN STOPPED OR CYCLING ON OVERLOAD

DAMAGED

REVERSING

VALVE

RESTRICTION IN DISCHARGE LINE

OVERCHARGE

OR NON-

CONDENSABLES

IN SYSTEM

LOW

REFRIGERANT

CHARGE

LINE VOLTAGE TOO HIGH OR LOW

DEFECTIVE RUN

CAPACITOR

(1-PH)

COMPRESSOR

BEARINGS

HIGH-LOAD

CONDITION

REVERSING

VALVE JAMMED IN MIDPOSITION

HIGH

SUPERHEAT

DEFECTIVE

START

CAPACITOR

DEFECTIVE FAN

MOTOR

CAPACITOR

LOOSE LEADS

AT

FAN MOTOR

FAN MOTOR

BURNED

OUT

LOW SUCTION

LOW HEAD

OUTDOOR FAN	OUTDOOR FAN
STOPPED	RUNNING
LOOSE LEADS	REVERSING
AT OUTDOOR
	VALVE STUCK
FAN MOTOR
INTERNAL FAN	RESTRICTED
MOTOR KLIXON
	LIQUID LINE
OPEN
FAN MOTOR	PISTON
	RESTRICTED OR
BURNED OUT
	IS CLOGGED
DEFROST RELAY
N.C. CONTACTS	UNDER-
OPEN ON	CHARGED
CIRCUIT BOARD
	OUTDOOR COIL
	DIRTY
	STRAINER
	RESTRICTED
	OUTDOOR COIL
	HEAVILY
	FROSTED
FAN MOTOR	DEFECTIVE
CONTACTS
WELDED CLOSED	DEFROST
IN DEFROST	THERMOSTAT
RELAY
REVERSING	DEFROST
	THERMOSTAT IN
VALVE DID NOT	POOR PHYSICAL
SHIFT	CONTACT WITH
	TUBE
UNIT NOT	DEFECTIVE
PROPERLY
	CIRCUIT BOARD
CHARGED
	BAD ELECTRICAL
	CONNECTION
	ANYWHERE IN
	DEFROST
	CIRCUIT

STRIP HEATERS NOT OPERATING

OUTDOOR

THERMOSTAT

DEFECTIVE

ODT SETTING

TOO LOW

CAP TUBE

PINCHED OR

BULB NOT

SENSING TRUE

ODT

STRIP HEATER

RELAY OR

CONTACTOR

DEFECTIVE

OPENING IN

POWER CIRCUIT

TO HEATER

ELEMENTS

BROKEN FUSE

LINK

BROKEN

HEATER

ELEMENT

OPEN (KLIXON)

OVER

TEMPERATURE THERMOSTAT

DEFECTIVE

ROOM

THERMOSTAT (2ND STAGE)

A90206

Fig. 60 – Heat Pump Troubleshooting - Heating Cycle

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