Operation
8 --- 35
8.6
Faults: Possible cause --- Remedy
The removal of faults that are not explicitly described in this service
manual may only be carried out by KAESER or by an authorised
KAESER service agency.
8.6.1
Working temperature too high
Possible cause:
Remedy:
The distance from the cooling air inlet
or outlet is too small.
Keep to the minimum distance and en-
sure sufficient ventilation.
Insufficient cooling air flow.
Ensure sufficient ventilation.
Ambient temperature too high.
Arrange for a supply of cooler air or
move the machine to a cooler place
(see chapter 1.6).
If ducting is used for cooling air dis-
charge it could be too narrow or too
long.
Have an authorised KAESER service
agent install adequately sized ducting.
If the machine is air ---cooled, the fluid/
air cooler could be clogged.
Clean the fluid/air cooler (see chapter
9.13).
If the machine is water ---cooled, the
heat exchanger could be clogged by
deposits.
Have an authorised KAESER service
agent inspect, clean or replace the
heat exchanger as necessary.
Air inlet filter mats clogged.
Clean or replace the filter mats.
Fluid level too low.
Top up to the correct level with recom-
mended cooling fluid.
Check and clean the dirt trap strainer
in the fluid scavenge line.
Thermostatic valve not functioning cor-
rectly.
Check valve spring and activating pis-
ton. Replace defective parts.
Wrong cooling fluid used.
Drain off old cooling fluid and replace
with recommended type.
Ask an authorized KAESER service
agent for recommendations on cooling
fluid types.
Fluid filter clogged.
Change the fluid filter (see chapter
9.11).
Airend defective.
Have the airend checked by an autho-
rised KAESER service agent.
8.6.2
Motor overload protection relay trips
Possible cause:
Remedy:
Protection relay is defective or incor-
rectly set.
Check the wiring and reset the relay if
necessary.
Replace a defective overload relay.
Motor runs on two phases; motor de-
fective or one of the customer’s fuses
blown.
Check power supply and wiring.
Change fuse(s) or motor as necessary.
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