EarthLinked SCWD-024-1C, Quick Start Instructions

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SCWD-QS (12/16) Page 55
G. Uncomfortable
temperature.
(Not enough
heat/cold air)
(cont’d)
5. Compressor fault.
5. To reset switch, turn primary power off then back on;
turn thermostat system switch to OFF, then back on.
6. Outdoor thermostat not
connected or failed
(heating mode).
6. Check outdoor thermostat and electric supplemental
heat operation. Confirm proper wiring. (Heating
mode only)
7. Refrigerant undercharged.
7. Check for refrigerant level in ACC.(Heating mode
only)
Repair leak, evacuate and recharge the system.
Check In-line sight glass in cooling mode.
8. Restriction in refrigerant
circuit.
8. Check for blockage or restriction, especially in Liquid
Flow Control. Assure that modification of non-ETI air
handler is performed.
Check valves, filter/drier and
anti-migration valve.
9. System is locked out on
high or low pressure, or
high temperature.
9. Check low pressure, high pressure and high
temperature switches:
Check limit cut-off pressures. Control is set to
actuate at 5 (R-22 & 407C)/25psig (R-410A) (low
pressure) and 400 (R-22 & 407C)/600 psig (R-410A)
(high pressure) +10%. High temperature switch:
>240
°
F. Check for continuity on all three switches
under normal pressure and temperature conditions.
Refer to Unit performance table.
10. Defective pressure
control.
10. Check limit cut-off pressures. Control is set to
actuate at 5 (R-22 & 407C)/25psig (R-410A) (low
pressure) and 400 (R-22 & 407C)/600 psig (R-410A)
(high pressure) +10%. Check for continuity on both
switches under normal pressure conditions.
11. Reduced air flow.
11. Check air ducts for leaks and repair. Check blower
operation. Check air filter(s). Remove air flow
restrictions (min.400 CFM/ton).
12. Unit undersized/
oversized.
12. Contact ETI Technical Support at 863-701-0096.
H. Poor
Compressor
Performance
(Runs, but Not
pumping
Refrigerant)
1. Four-way reversing Valve
stuck and Compressor
will not create a pressure
difference between high
and low side of the
system.
1a. Pinch closed the Discharge Line to verify the
Compressor builds High Pressure, if so, replace
Four-way reversing Valve and filter drier.
1b. If High pressure does not build after pinching the
Discharge Line closed, the Compressor has failed,
replace Compressor, filter drier and run capacitor.
2. Bad Compressor
2. Replace after verification of Amp Draw below RLA
and pinch closed the Discharge Line between the
Compressor and the Four-way reversing Valve to
verify pressure does not build on the high side.
Replace filter drier and run capacitor.
Figure 35. System Troubleshooting Chart (cont.)