Gardner Denver ELECTRA-SCREW EDEQHH, Operating And Service Manual

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13–8–610 Page 41
SYMPTOM POSSIBLE CAUSE REMEDY
Oil Carry–Over (Continued) 7. Operation at elevated 7. Reduce temperature. See
discharge temperatures. High Discharge Air
Temperature, page 40,
this section.
8. Scavenge line check 8. Replace check valve.
valve failure.
9. Water condensate in oil. 9. Check oil reservoir tempera–
ture and if low, change
thermal mixing valve element
to higher temperature.
“CHANGE SEPARATOR” light 1. Separator differential is 1. Change Separator.
(Flashing or on steadily) greater than 8 psid (.5 Bars).
ON STARTUP
2. Bad Transducer. 2. Verify readings with mechan–
ical gauges. If defective,
replace with 88H242.
3. Misadjusted minimum 3. Set minimum pressure valve
pressure valve. at 65 psig (4.5 Bars).
4. Sticky minimum pressure 4. Disassemble and clean.
valve.
5. Defective minimum 5. Rebuild or replace.
pressure valve.
[Won’t set at 65 psig (4.5 Bars)]
“CHANGE SEPARATOR” light 1. Separator differential is 1. Change Separator.
(Flashing or on steadily) greater than 8 psid (.5 Bars).
WHILE RUNNING
2. Electrical noise creating 2. Make sure transducer wires
false readings. are kept to a minimum length
and are twisted.
3. Oil reservoir is overfilling. 3. Fill to proper level (see
FIGURE 5–1, Section 5,
page 27).
4. Unit is rapidly cycling. 4. Adjust subtractive pilot. See
Service Memo #248. (Add
subtractive pilot if unit does
not have one.)
5. Defective transducer. 5. Verify readings with mechan–
ical gauges. If defective,
replace with 88H242.
6. Plugged aftercooler, due 6. Clean or replace aftercooler.
to freezing or varnishing.
7. Oil reservoir shotgun 7. Call factory for specifications.
improperly located.