EarthLinked AVS-0030-A Quick Start Instructions page 55

C. System blows
fuses or trips
circuit breaker
(con't)
D. Air handler fan will
not run.
E. System will not
switch to cooling
mode (continues
to run in heating
mode).
F. Compressor turns
off on thermal
overload.
(check until
compressor's
temperature
reaches room
temperature
before
determining the
internal overload
is defective)
G. Uncomfortable
temperature.
(Not enough
heat/cold air)
SD-410-QS (H) (06/15)
4. Excessively high or low supply
voltage or phase loss (3 only).
5. Faulty run capacitor or soft start
components.
1. Thermostat defective.
2. Defective fan relay in air handler.
3. Faulty motor/capacitor.
1. Thermostat faulty.
2. Open heat/cool circuit (orange
wire).
3. Four-way valve solenoid not
energized.
4. Four-way valve stuck in heat
mode.
1. Refrigerant leak.
2. System undercharged.
3. Four-way valve is short circuiting
refrigerant and bypassing hot gas
to suction.
4. Compressor valves are faulty/
bypassing.
5. Compressor contactor dirty or
pitted. (> .5 Ohms Resistance
across Contact points)
6. Faulty run capacitor or start
components.
7. Compressor with locked rotor.
1. Thermostat fault.
2. Defective heating element(s).
(Heating mode).
3. Defective heater relay.
(Heating mode).
4. Thermal limit is open. (heat kit)
5. Compressor fault.
6. Outdoor thermostat not connected
or failed (heating mode).
Figure 42. System Troubleshooting Chart (con't)
4. Note voltage range limitations specific
to the compressor.
5. Replace as necessary.
1. Check for 24V power on eight-post
terminal strip between "C" and "G".
2. Check relay operation and continuity of
terminals.
3. Refer to ECM troubleshooting.
1. Check operation of thermostat and
replace if necessary.
2. Check for 24V on eight-post terminal
strip between "O" and "C".
3. Check for magnetism at end of valve
coil.
Check for 240V at coil. Check Heat/Cool
Relay.
4. Contact ETI Technical Support at 863-
701-0096.
1. Check for refrigerant level in ACC.
Repair leak, evacuate system and
recharge with refrigerant.
2. Charge system.
3. Replace four-way valve, evacuate,
recharge and start-up system.
4. Use Rubber Mallet on Scroll Comp's.
before condemning. Replace
compressor and evacuate, recharge
and start-up system.
5. Replace as necessary.
6. Replace as necessary.
7. Replace as necessary.
1. Adjust thermostat settings / Replace
thermostat.
2. Check resistance element(s) for
continuity.(Heating mode only)
3. Check relay for proper operation.
Replace if defective. (Heating mode
only)
4. Check continuity across thermal limit
switch. (Heating mode only)
5. To reset switch, turn primary power off
then back on; turn thermostat system
switch to OFF, then back on.
6. Check outdoor thermostat and electric
supplemental heat operation. Confirm
proper wiring. (Heating mode only)
Page 55