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