Troubleshooting Chart - Goodman H Series Installation Instructions Manual

HIGH VOLTAGE!
D
ISCONNECT
WARNING
SOURCES MAY BE PRESENT
INJURY OR DEATH
SYMPTOM
High head - low suction
High head - high or normal suction a. Dirty condenser coil
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 a. Low airflow

TROUBLESHOOTING CHART

ALL
POWER BEFORE SERVICING OR INSTALLING THIS UNIT
. F
AILURE TO DO SO MAY CAUSE PROPERTY DAMAGE
.
POSSIBLE CAUSE
a. Restriction in liquid line or flowrator
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 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 b. Check refrigerant charge and / or airflow
c. High pressure switch cuts out
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
b. Low refrigerant charge
c. Operating unit in cooling mode below
65°F outdoor temperature
16
. M
ULTIPLE POWER
,
PERSONAL
REMEDY
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
flowrator. Remove debris or replace flowrator.
a. Check for unit voltage at contactor in unit
c. Check for 24 volts at contactor coil replace if
contacts are open
d. Replace fuse or reset breaker Check wiring -
replace transformer
f. Reset high pressure control or check unit charge
High pressure control opens at 610 psig
Low pressure control opens at 22 psig
g. Replace compressor
NOTE: Wait at least 2 hours for overload to
reset
a. Check for unit voltage at compressor check &
tighten all connections
b. Wait at least 2 hours for overload to reset
If still open, replace the compressor.
c. At compressor terminals, voltage must be within
10 % of nameplate volts when unit is operating
d. Check capacitor. If defective, replace.
a. Increase speed of blower or reduce restriction -
replace air filters
a. Replace - check for correct voltage
c. Check airflow (Indoor & outdoor)
a. Increase speed of blower or reduce restriction
replace air filters
a. Recheck load calculation
b. Replace
c. Replace
a. Recalculate load
b. Check - should be approximately 400 CFM per ton
c. Charge per procedure attached to unit service
panel
d. At compressor terminals, voltage must be within
10% of nameplate volts when unit is
operating
a. Check - should be approximately 400 CFM per ton,
dirty air filters, all duct outlets open
b. Properly charge unit
c. Install or check low ambient control, should be
open below 65°F outdoor temperature