Gardner Denver VST110 Operating And Service Manual page 80

SYMPTOM
Excessive oil
1.
consumption
2.
3.
High discharge
1.
air, oil
Temperature
(air, water
cooled cores)
2.
3.
4.
5.
6.
High discharge
1.
air, oil
Temperature (air
cooled cores)
2.
High discharge
1.
air, oil
Temperature
(water cooled
cores)
VFD shutdown
1.
on overheat
2.
POSSIBLE CAUSE
Oil separation malfunction
Oil leaks at fittings and gaskets
Shaft seal leaking
Thermostatic mixing valve stuck on
bypass mode
Clogged oil filter
Clogged cooler (interior)
Clogged oil lines
Low oil level
Low oil injection pressure but
normal discharge pressure
Dirty or clogged cooler outer
surfaces.
Insufficient cooling air flow
Optional water temp regulating or
shut-off valve malfunction
Ambient air exceeds 45°C
VFD air filters dirty
13-17-605 Page 79
REMEDY
See "Oil Carryover" in this section.
1.
2. Detect and correct oil leaks.
3.
Inspect or replace shaft seal.
1. Inspect or replace valve.
2. Inspect and replace filter.
3. Inspect and clear cooler.
4. Inspect and clear oil lines.
5. Add oil to proper level.
6 Oil flow control solenoid valve
malfunction – Refer to Section 5, page
42 "Compressor Lubrication" for details.
1. Inspect and clean cooler outer
surfaces.
2. Verify {ductwork) back pressure does
not exceed .1" water gauge.
Refer to Section 6, page 50 "Heat
1.
Exchangers" for details.
1.
Check local ventilation and improve, if
necessary.
2.
Inspect, clean or replace elements.