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HD 4000 C / HD 6000 C
English
5.956-648 A10369 (06/98)
F4
System runs for about 15
sec after pressing the
unlock button and then
switches off. General fault
and “Admission pressure
of hot-water pump too low”
LED light up
Admission pressure of
hot water too low
check pump rotation
direction, check water
intake
Customer
Service
Pressure switch
precompression
hot-water pump or
cable in ABS hot
water defective
replace Customer
Service
Pump starts during
available time but not by
opening the handgun
Pressure switch or
cable to pressure
switch defective
replace Customer
Service
Unlock button activated,
“operational” indicator light
illuminates, system does
not start up
Pressure switch
defective
replace Customer
Service
While activating the HD
pistols the unit switches
itself off
Flow switch does not
function
check flow switch Customer
Service/
Electrician
Unlock button activated,
system starts up,
“operational” indicator light
does not illuminate
“operational” indicator
light defective
switch Emergency-STOP
master switch Q1 to
position 0, open control
cabinet and verify or
replace components
Customer
Service/
Electrician
System does not switch on Flow switch S2
defective
replace upper part of flow
switch
Customer
Service/
Electrician
Remote start button does
not function
System in a
malfunction state
eliminate the cause and
press unlock button
Operator
F. Trouble Shooting