Installation guide

TROUBLESHOOTING
[
COMPRESSOR ]WILL NOT RUN
1
CONTACT OPEN
,..t DEFECTIVE LOW-
VOLTAGE
TRANSFORMER
.._ CONTACTOR
COIL OPEN OR
SHORTED
OPENIN[_ORTHERMOSTAT
_'f LIQUID-LINE
PRESSURE
SWITCH OPEN
m_LOSS OF CHARGE
_{ OPEN CONTROL ]CIRCUIT
[
-_[ CONTADTORCLOSED
_. OMPRESSOR
POWER SUPPLY
OPEN
_[ LOOSE LEADS ATCOMPRESSOR
_[ FAULTY STARTGEAR (1PH)
•"_ COMPRESSOR
STUCK
._ COMPRESSOR
INTERNAL
OVERLOAD OPEN
j OPEN, SHORTED, t
OR GROUNDED
COMPRESSOR
MOTOR
l WtNOtN_SJ
DEFECTIVE RUN 1
CAPACITOR
I
COMPRESSOR
RUNS BUT
-- CYCLES ON
INTERNAL
OVERLOAD
-'_" DIRTY FILTERS l
OR INDOOR COtL
_[ INDOOR FAN DEFECTIVE FAN
STOPPED OR MOTOR
CYCLING ON CAPACITOR
OVERLOAD
4°-°1 1
REVERSING LOOSE LEADS AT
VALVE FAN MOTOR
4L RESTRICTION tN FAN MOTORDISCHARGE LINE BURNED OUT
_.[ OVERCHARGE i
OR NON-
CONDENSABLES
IN SYSTEM
1
REFRIGERANT
CHARGE
___ UNE VOLTAGE
TOO HIGH OR
LOW
,_[ DEFECTIVE RUN
CAPACITOR
(1 -PH)
__ COMPRESSOR
BEARINGS
FAULTY
-_ HIGH*LOADCONDmON
VALVE JAMMED
IN MIDPOSITION
NO HEATING OR
INSUFFICIENT
HEATING
T
HIGH ]SUPERHEAT
LOW SUCTION
LOW HEAD
I
__.____J
.__[ LOOSE LEADS AT 1
OUTDOOR PAN
MOTOR
_{ INTERNAL
FAN MOTOR
OVERLOAD
OPEN
FAN MOTORBURNED OUT
_[ DEFROST RELAY
NC
CONTACTS OPEN
ON CIRCUIT
BOARD
FAN MOTOR t
CONTACTS
WELDED CLOSED
IN DEFROST
RELAY
REVERSING
VALVE DID NOT
SHtFT
UNIT NOT
PROPERLY
CHARGED
COMPRESSOR 1
RUNS
INSUFFICIENT
HEATING
i
k
_[ OUTDOOR FANRUNNING
REVERSING
VALVE STUCK
_[ RESTRICTED
LIQUID LINE
_[ ACCURATER®
PISTON
_RESTR{CTED
OR CLOGGED
UNDER*CHARGED
_[ OUTDOOR COIL 1DIRTY
'_ STRAINER
RESTRICTED
OUTDOOR COIL ]
J
HEAWLY
FROSTED
__ DEFECTIVE
DEFROST
TRERMDSTAT
f DEFROST
THERMOSTATIN
POOR PHYSICAL
CONTACT WITH
TUBE
-_ DEFECTIVE
C_RGUtTBOARD
BAD ELECTRICAL l
CONNECTION
ANYWHEREIN
DEFROST CIRCUIT
l
1
-- STRIP HEATERS
NOT OPERATING
J
OUTDOOR ]
THERMOSTAT
CTIVE
DOT SETTING
TOO LOW
CAP TUBE
PINCHED OR
BULB NOT
SENSING TRUE
OUTDOOR TEMP
_[ STRIP HEATER
RELAY OR
CONTACTOR
DEFECTIVE
OPENINGIN }
POWER CIRCUIT
TO HEATER
_ENTS
BROKENLINKFUSE ]
_ BRGKEN HEATER ]ELEMENT
__[ OPEN OVER- I
TEMPERATURE
THERMOSTAT
._DEFECTiVE ROOr_
THERMOSTAT
(2ND STAG_
LEGEND
NC -- Normally Closed
ODT -- Outdoor Thermostat
NOTE: For systems with indoor units equipped with microprocessor
control, see separate controls, service, and troubleshooting manual.
Fig. 11 - Troubleshooting the Cooling Cycle
A07435
14