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HD 4000 C / HD 6000 C
English
5.956-648 A10369 (06/98)
F. Trouble Shooting
F2
Problem Possible cause Remedy by whom
General fault and
“Water supply fault”
LED light up on
printed circuit board
Insufficient water in
float tank
Check site water supply Operator
Temperature of the water
inlet too high
Reduce inlet temperature Operator
General fault and
“HD pump
temperature fault”
LED light up on
printed circuit board
Cooling water quantity too
low:
Strainer in pressure reduction
valve contaminated
Clean strainer Operator
Mains water pressure too low Raise pressure Operator
Cooling coil calcified,
solenoid valve defective
Decalcify,
replace solenoid valve
Operator
Oil level too low Check oil level Customer
Service
Oil change not made, owing
to which there is oil carbon
under the piston guide shoes,
piston seizing.
Check pump parts,
replace as necessary.
Make an oil change
Customer
Service
General fault and
“Admission pressure
of hot-water pump
too low” LED light
up. (Only with ABS
hot water)
Rotation direction of
precompression pump wrong
Change rotation direction Electrician
Pressure switch
precompression hot-water
pump in the ABS hot water
defective
Replace pressure switch Customer
Service
General fault and
“Drop in system
pressure” LED light
up on the printed
circuit board (flow
without pressure
longer than
15 seconds)
Too many utilisers
simultaneously opened
Close down some utilisers Operator
Pipe burst in the
high-pressure network
Turn off installation and
repair pipeline
Customer
Service
Pressure switch defective Replace pressure switch Customer
Service