Troubleshooting Chart - Goodman GPC 13 SEER H Series Installation Instructions Manual

WARNING
SYMPTOM
High head - low suction
High head - high or normal suction
Low head - high suction
Unit will not run
Condenser fan runs,
compressor doesn't
Low suction - cool compressor
Iced evaporator coil
Compressor short cycles
Registers sweat
High suction pressure
Insufficient cooling
Evaporator coil freezing or frosting

TROUBLESHOOTING CHART

HIGH VOLTAGE!
D ALL
ISCONECT POWER BEFORE SERVICING OR INSTALLING THIS UNIT
. F
SOURCES MAY BE PRESENT
.
INJURY OR DEATH
POSSIBLE CAUSE
a. Restriction in liquid line or flowrator
a. Dirty condenser coil
b. Overcharged
c. Condenser fan not running
a. Incorrect flowrator
b. Defective compressor valves
c. Flowrator not seating properly
a. Power off or loose electrical connection
b. Thermostat out of calibration set too high b. Reset.
c. Defective contactor
d. Blown fuses or tripped breaker
e. Transformer defective
f. High or low pressure control open
(Optional)
g. Compressor overload contacts open
a. Loose connection
b. Compressor stuck, grounded or open
winding open internal overload
c. Low voltage connection
d. Capacitor weak, open, or shorted
a. Low indoor airflow
a. Defective overload protector
b. Unit cycling on low pressure control
a. Low airflow
a. Excessive load
b. Defective compressor
c. Reversing valve not seating properly.
a. Improperly sized unit
b. Improper airflow
c. Incorrect refrigerant charge.
d. Incorrect voltage
a. Low airflow
b. Low refrigerant charge
c. Operating unit in cooling mode below
65°F outdoor temperature
AILURE TO DO SO MAY CAUSE PROPERTY DAMAGE
a. Remove or replace with proper size flowrator.
a. Clean coil.
b. Correct System charge.
c. Repair or Replace.
a. Replace with correct flowrator.
b. Replace compressor.
c. Check for debris under flowrator or deformed
a. Check for unit voltage at contactor in unit.
c. Check for 24 volts at contactor coil replace if
d. Replace fuse or reset breaker.
e.
f. Reset high pressure control or check unit charge.
g. Replace compressor.
a. Check for unit voltage at compressor check &
b. Wait at least 2 hours for overload to reset If still
c. At compressor terminals, voltage must be within
d. Check capacitor. If defective, replace.
a.
a. Replace - check for correct voltage.
b. Check refrigerant charge and / or airflow.
a. Increase speed of blower or reduce restriction
a. Recheck load calculation.
b. Replace.
c. Replace.
a. Recalculate load.
b. Check - should be approximately 400 CFM per
c. Charge per procedure attached to unit service
d. At compressor terminals, voltage must be within
a. Check - should be approximately 400 CFM per
b. Properly charge unit.
c. Install or check low ambient control, should be
13
. M
ULTIPLE POWER
,
PERSONAL
REMEDY
flowrator. Remove debris or replace flowrator.
contacts are open.
Check wiring - replace transformer.
High pressure control opens at 425 psig.
Low pressure control opens at 25 psig.
NOTE: Wait at least 2 hours for overload to reset.
tighten all connections.
open, replace the compressor.
10 % of nameplate volts when unit is operating.
Increase speed of blower or reduce restriction -
replace air filters.
replace air filters.
ton.
panel.
10% of nameplate volts when unit is operating.
ton, dirty air filters, all duct outlets open.
open below 65°F outdoor temperature.