Instruction Manual Breathing Air Compressors
48
4.6. TROUBLE-SHOOTING
Trouble Cause Remedy
Drive motor (electric)
Motor will not start Electric circuitry faulty Before attempting to make any repairs,
check all fuses, terminal connections,
wire leads, make sure that motor data
complies with mains supply
Drive engine (petrol)
Engine will not start
See engine instructions See engine instructions
Engine running unsteadily
V-belt worn Change drive v-belt
Engine stops
Low oil level Top up motor oil
Drive system
V−belt excessively worn out; black resi-
due on v−belt cover
Misalignment of v-belt pulleys readjust
Compressor block
No oil pressure
Low oil level Check oil level, see chapter 4.4.1.
Oil foam in the crankcase Last stage piston worn Operate compressor with final stage
valve head removed. If oil flows contin
uously out of cylinder, replace piston
and liner
Last stage outlet valve defective Replace
Compressor output insufficient Condensate drain valve(s) and/or fit
tings leaking
Tighten and reseal
Premature opening of final safety valve Clean final safety valve and readjust
Piston rings worn Replace
Excessive piston clearance Replace
Pipes leaking Re-tighten
Safety valves between individual stages
releasing pressure
Intermediate pressure too high Check valves - see chap. 4.5.8. - Service
and clean valves
Valves not closing properly
Compressor running too hot Insufficient supply of fresh cooling air Check location: max. ambient tempera
ture + 45 °C (113 °F)
Intake or outlet valves not closing
properly
Check and clean valves, replace as nec
essary
Wrong direction of rotation See arrow on compressor and remedy
accordingly
Oil residue in delivered air Improper maintenance of filters, filter
cartridge saturated
Remedy filters, change filter cartridges
Wrong oil type Use right oil type (see oil list) and clean
sooted valves
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