Operating Manual -
EVO
®
Line
[en] 07/2020
10.1
10 Troubleshooting
Fault
Possible cause
Remedy
See chapter
Incorrect direction of rota-
tion
Phases reversed
Reconnect 2 supply lines
System does not start
No electricity
Check
Combistat switches off due
to excessively high tem-
perature
Check oil level, cooling,
thermo-bypass
System difficult to start
Motor output insufficient
Check
Drive gear ratio "too fast"
Check
Star-delta switchover
incorrect
Set
Screw compressor air end
is flooded with oil
Check
System has not been
discharged yet
Check
Oil filling too viscous
Check viscosity
Differential pressure
Pressure in the separator
cartridge is too high if the
cartridge is full or clogged
Replace separator car-
tridge
Combistat switches off
due to excessively high
temperature
Oil shortage
Check oil level in oil reser-
voir and top up if neces-
sary
Oil filter soiled
Replace oil filter cartridge
Thermostat defective
Replace thermostat
Oil cooler soiled
Clean oil cooler on air side,
clean on oil side if neces-
sary
Incorrect installation
a) Room ventilation
b) Exhaust air blocked
c) Thermal short circuit
Observe recommendation
on installing system
Combistat faulty or incor-
rectly adjusted
Adjust combistat or
replace
Fan has failed
Check
Содержание EVO15
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