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1036100102L02 1904V002
Troubleshooting
14 Tips for service technicians
The following information about troubleshooting is intended solely for service technicians. Re-
pairs must only be carried out by service technicians.
De-energise the unit prior to working on it or in the event of potential danger (e. g. pull the
mains plug) and prevent it from being switched back on again.
Fault
Probable cause
Solution
Compressor will not start
No mains voltage. On three-
phase units: one phase is missing
or not connected (generation of a
humming sound)
i
Check the mains fuse; if neces-
sary, switch the circuit breaker
back on. If the fuse is defective,
replace it. Check the mains
supply voltage.
Undervoltage or overvoltage
i
Measure the supply voltage; call
an electrician if necessary.
Relief valve defective, unit starts
against pressure
i
Check that the relief valve
discharges after switching off
the unit. Free up the movement
of the relief valve operable or
replace it.
Mechanical sluggishness of a unit
(piston is stuck); motor protection
has tripped
i
Switch the unit off and discon-
nect it from the power supply,
remove the fan hood from the
blocked compressor and turn
the fan wheel. If this is not
possible, replace the piston and
cylinder or the complete unit.
Humming noise from
motor
Motor capacitor is defective
i
Replace the capacitor.
EN
Summary of Contents for H2A-160M
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