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Pump does'nt
start
No mains
power
no
Phase failure
no
Motor protection
switch has tripped
no
23
yes
Connect
mains plug
yes
Check fuse
Wait for motor
yes
to cool and activate
protection switch
Pump blocked
n
yes
Working chamber
dirty
no
yes
Diaphragm spring
washer loose
no
yes
Diaphragm torn
no
yes
Exhaust closed
no
yes
Cross section
of exhaust too small
no
Too high an
yes
ambient temperature,
over + 40 °C
no
yes
Con-rod or motor
bearing jammed
Clean
working chamber
Tighten diaphragm
spring washer
Replace
diaphragms
Clean
exhaust channels
Select greater
cross section
Ensure adequate
ventilation
b
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