Troubleshooting - Wolf ZP-3 Installation Instructions Manual

Charging pump operating display:
Fault: DHW temperature is below the
selected set value
Fault: freshwater module does not
deliver any DHW when draw-off rate
is low (flow rate)
3065014_201612

Troubleshooting

Faults in electrical equipment and mechanical or hydraulic components may only be
rectified by qualified contractors specially trained in these fields.
If a fault occurs that cannot be remedied by means of the measures described below,
inform the manufacturer or a service partner authorised by the manufacturer.
LED constantly green:
LED flashing green:
LED constantly off:
Mixer/servomotor – for operating condition, see chapter Commissioning
Possible cause
Temperature in buffer
cylinder too low
Charging pump is not deli-
vering any heating water
Temperature sensor S1
(primary) faulty
Sensor VFS faulty
Set temperature set too
low
Mixer/servomotor faulty
Freshwater module faulty
Plate heat exchanger
scaled up
Possible cause
DHW and cold water con-
nection interchanged on
the freshwater module
Sensors faulty
pump running
pump on standby; no DHW draw-off
fault; see below
Fault remedy
Raise temperature in buffer cylinder; check position of
temperature sensors.
• Vent primary circuit with charging pump; see chapter
Commissioning
• Check hydraulic pressure drop between buffer cylin-
der and freshwater module and reduce if required
• Check whether all ball valves in the primary and
secondary circuit are open
• Check whether the freshwater module is correctly
connected to the drinking water and heating network
• Check the module is working correctly – for tempe-
rature and flow sensors, see chapter Commissioning
• Check signal lead (PWM) on the charging pump
• Check the power supply to the charging pump
• Check the charging pump is correctly connected to
the controller
• Replace faulty charging pump
Check function via service key; see chapter Commis-
sioning
Check function via service key; see chapter Commis-
sioning
Correct set value on the controller; see chapter Com-
missioning
Check function; see chapter Commissioning
Check mains connection
Replace freshwater module
Descale or replace plate heat exchanger
Fault remedy
Contact installer/contractor
Check function via service key; see chapter Commis-
sioning
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