EarthLinked SCWD-024-1C, Quick Start Instructions

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SCWD-QS (12/16) Page 54
C. System blows fuses or
trips circuit breaker
(cont.)
3. Internal short circuit. Loose or
improper connection in system.
3. Check wiring in system. See appropriate
wiring schematics and diagrams. Test
components, especially the compressor,
for shorts and grounds.
4. Excessively high or low supply
voltage or phase loss (3

only).
4. Note voltage range limitations specific to
the compressor.
5. Faulty run capacitor or soft
start components.
5. Replace as necessary.
D. Air handler fan will not
run.
1. Thermostat defective.
1. Check for 24V power on eight-post
terminal strip between “C” and “G”.
2. Defective fan relay in air
handler.
2. Check relay operation and continuity of
terminals.
3. Faulty motor/capacitor. 3. Refer to ECM troubleshooting.
4. Defective low voltage wire or
connection
4. Check connection, replace wire as
necessary.
E. System will not switch
to cooling mode
(continues to run in
heating mode).
1. Thermostat faulty.
1. Check operation of thermostat and
replace if necessary.
2. Open heat/cool circuit (orange
wire) or low voltage
wire/connection.
2. Check for 24V on eight-post terminal strip
between “O” and “C”.
3. Four-way reversing valve
solenoid not energized.
3. Check for magnetism at end of valve coil.
Check for 240V at coil. Check Heat/Cool
relay. Replace relay if necessary.
4. Four-way reversing valve
stuck in heat mode.
4. Contact ETI Technical Support at 863-
701-0096.
F. Compressor turns off
on thermal overload.
(check until
compressor’s
temperature reaches
room temperature
before determining
the internal overload
is defective)
1. Refrigerant leak.
1. Check for refrigerant level in ACC (in
heat mode). Repair leak, evacuate
system and recharge with refrigerant.
2. System undercharged. 2. Charge system (in heat mode only).
3. Four-way reversing valve is
short circuiting refrigerant and
bypassing hot gas to suction.
3. Replace four-way reversing valve and
filter drier, evacuate, recharge and start-
up system in heat mode.
4. Compressor valves are faulty/
bypassing.
4. Use Rubber Mallet on Scroll Comp’s.
before condemning. Replace compressor
and filter drier, evacuate, recharge and
start-up system in heat mode
.
5. Compressor contactor dirty or
pitted. (> .5 Ohms Resistance
across Contact points) 5. Replace as necessary.
6. Faulty run capacitor or start
components.
6. Replace as necessary.
7. Compressor with locked rotor. 7. Replace as necessary.
G. Uncomfortable
temperature.
(Not enough heat/cold
air)
1. Thermostat fault.
1. Adjust thermostat settings / Replace
thermostat.
2. Defective heating element(s).
(Heating mode).
2. Check resistance element(s) for
continuity.(Heating mode only)
3. Defective heater relay.
(Heating mode). 3. Check relay for proper operation.
Replace if defective. (Heating mode only)
4. Thermal limit is open. (heat
kit)
4. Check continuity across thermal limit
switch. (Heating mode only)
Figure 35. System Troubleshooting Chart (cont.)