SD-410-QS (H) (06/15)
Page 56
G. Uncomfortable
temperature.
(Not enough
heat/cold air)
(cont’d)
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/dryer and anti-migration valve.
9. System is locked out on high or
low pressure.
9. Check low pressure and high pressure:
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. 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. 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 Reversing
Valve.
1b. If High pressure does not build after
pinching the Discharge Line closed, the
Compressor has failed, replace
Compressor.
2. Bad Compressor
2. Replace after verification of Amp Draw
below RLA and pinch closed the
Discharge Line between the
Compressor and the reversing Valve to
verify pressure does not build on the
high side.
Figure 42. System
Troubleshooting Chart (con’t)
Summary of Contents for AVS-0030-A
Page 15: ...SD 410 QS H 06 15 Page 15 Figure 8a SD H Compressor Unit Electrical Ladder Diagram 230 1 60...
Page 16: ...SD 410 QS H 06 15 Page 16 Figure 8b SD H Compressor Unit Electrical Schematic Diagram 230 1 60...
Page 17: ...SD 410 QS H 06 15 Page 17 Figure 9a SD H Compressor Unit Electrical Ladder Diagram 230 3 60...
Page 18: ...SD 410 QS H 06 15 Page 18 Figure 9b SD H Compressor Unit Electrical Schematic Diagram 230 3 60...
Page 29: ...SD 410 QS H 06 15 Page 29 Figure 15 Disassembled Plug Connector...
Page 49: ...SD 410 QS H 06 15 Page 49 Figure 38 Cooling Mode Start Up...
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