Amana GSH13024 Installation Manual download pdf (Page 14)

TROUBLESHOOTING CHART

SYMPTOM

High head - low suction a. Restriction in liquid line or flowrator a. Remove or replace with proper size flowrator.

High head - high or normal suction a. Dirty condenser coil a. Clean coil.

b. Overchar

ed b. Correct S

stem char

c. Condenser fan not runnin

c. Re

air or Re

lace.

a. Incorrect flowrator a. Re

lace with correct flowrator.

b. Defective com

ressor valves b. Re

lace com

ressor.

c. Flowrator not seating properly c. Check for debris under flowrator or deformed

flowrator. Remove debris or replace flowrator.

d. Defective reversing valve d. Replace reversing valve.

a. Power off or loose electrical connection a. Check for unit voltage at contactor in unit.

b. Thermostat out of calibration set too hi

h b. Reset.

c. Defective contactor c. Check for 24 volts at contactor coil replace if

contacts are open.

d. Blown fuses or tripped breaker d. Replace fuse or reset breaker.

e. Transformer defective e.

Check wiring - replace transformer.

f. High or low pressure control open

(Optional)

f. Reset high pressure control or check unit charge.

High pressure control opens at 610 psig.

Low

ressure control o

ens at 22

g. Compressor overload contacts open g. Replace compressor.

NOTE: Wait at least 2 hours for overload to reset.

Condenser fan runs,

compressor doesn't

a. Loose connection a. Check for unit voltage at compressor check &

tighten all connections.

b. Compressor stuck, grounded or open

winding

open internal overload

b. Wait at least 2 hours for overload to reset If still

open, replace the compressor.

c. Low voltage connection c. At compressor terminals, voltage must be within

10 % of nameplate volts when unit is operating.

d. Capacitor weak, open, or shorted d. Check capacitor. If defective, replace.

Low suction - cool compressor a. a.

Iced evaporator coil

a. Defective overload protector a. Replace - check for correct voltage.

b. Unit cycling on low pressure control b. Check refrigerant charge and / or airflow.

a. a. Increase s

eed of blower or reduce restriction

lace air filters.

a. Excessive load a. Recheck load calculation.

b. Defective com

ressor b. Re

lace.

c. Reversin

valve not seatin

erl

.c.Re

lace.

a. Im

erl

sized unit a. Recalculate load.

b. Improper airflow b. Check - should be approximately 400 CFM per

ton.

c. Incorrect refrigerant charge. c. Charge per procedure attached to unit service

panel.

d. Incorrect voltage d. At compressor terminals, voltage must be within

10% of nameplate volts when unit is operating.

Increase speed of blower or reduce restriction -

replace air filters.

Insufficient cooling

High suction pressure

REMEDYPOSSIBLE CAUSE

Compressor short cycles

Registers sweat Low airflow

Low head - high suction

Unit will not run

Low indoor airflow

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Amana GSH13024 Installation Manual Page 14

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