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13-11-607 Page 53
SECTION 10
TROUBLESHOOTING
SYMPTOM
POSSIBLE CAUSE
REMEDY
Compressor fails to start
1. Wrong lead connections.
1.
Change leads.
2. Blown fuses in control box.
2.
Replace fuse.
3. Motor starter overload
heaters tripped.
3.
Reset and investigate
cause of overload
4. Pressure in reservoir.
4.
Inspect blowdown valve.
5. Read error message on
control panel.
5.
Take appropriate action.
See Section 4.
6. Remote Contact is open.
6.
Replace switch or jumper
(terminals 6 & 9).
Compressor starts but stops
after a short time
1. High discharge temperature.
1. See “High discharge air
temperature”, this Section.
2. High discharge temperature
switch malfunction.
2. Replace switch.
3. Blown fuse in starter/control
box.
3. Replace fuse (investigate if
fuses continue to blow).
4. Motor starter overload
heaters trip.
4. Reset and investigate
cause of overload.
Compressor does not unload
(or load)
1. Improperly adjusted control.
1. Refer to Section 4 and
adjust control.
2. Air leak in control lines.
2. Determine source of leak
and correct.
3. Restricted control line.
3. Clean control lines.
4. Blowdown valve malfunction.
4. Repair, clean or replace
valve.
Compressor shuts down or
falters while unloading
1. Purge air pressure reaching
airend is excessive.
1. Adjust auxiliary blowdown
pressure switch to the
proper level. See Section 4
for adjustment details.
Replace if defective.
Compressor cycles from load to
unload excessively
1. Insufficient receiver capacity.
1. Increase receiver size.
2. Restriction in control tubing.
2. Inspect and clean control
tubing.
Summary of Contents for PUREAIR EWC99C
Page 7: ...13 11 607 Page 2 Figure 1 2 PACKAGE ILLUSTRATION 307EWC797 B Ref Drawing...
Page 8: ...13 11 607 Page 3 Figure 1 3 AIR WATER SCHEMATIC 308EWC797 F Ref Drawing...
Page 25: ...13 11 607 Page 20 Figure 4 2 FLOW CHART FOR SETUP PROGRAMMING 300EWC1255 Ref Drawing...
Page 38: ...13 11 607 Page 33 Figure 4 4 WIRING DIAGRAM FULL VOLTAGE 305EWC546 B Ref Drawing Page 1 of 2...
Page 39: ...13 11 607 Page 34 305EWC546 B Ref Drawing Page 2 of 2...
Page 41: ...13 11 607 Page 36 306EWC546 B Ref Drawing Page 2 of 2...