Wilo P260 User Manual

7: Fault Finding Chart
Indication
Possible Reason
Action
Pump/s Don’t Run
Power Fail, Pressure not below CF-
Differential pressure. Pump Drive fault.
Check: Power to the Unit; Discharge valve is
open; Pressure settings; Electrical connections.
Boiler Not Running.
Power Failure, Low Pressure Alarm.
Check: for Low Pressure Alarm; Electrical
connections.
LCD is blank; Power
LED & Backlighting OK
Contrast fault. Connection fault, firmware
lock-up error.
Reset the Display by pressing Reset Key for 5-
seconds. Check ribbon cable connectors. Reset
the Control PCB by Power-down & Restart.
LCD Blank, No Power
LED or backlighting.
Power failure. PCB Failure.
Check: Mains feed to Unit; PCB fuse F3; Ribbon
cable connectors; Electrical connections .
Pump Trip Alarm
Pump draws excessive current.
Reset Alarm. Pump may require servicing. Check:
Pump rotates freely; Water flow.
Pump Fail Alarm
Pump draws zero current.
Check: Fuse (replace if required); Wiring; Pump.
Low Pressure Alarm
System Pressure is below Low Pressure
Alarm setting.
Check: Pumps operate correctly; System for
leaks/flooding; Alarm Latching is OFF.
High Pressure Alarm
System Pressure is above High Pressure
Alarm setting.
Check: Pumps operate correctly; ‘Pump Check’
settings (adjust frequency if required); Discharge
Isolation valve; Alarm Latching is OFF.
System Fill Alarm
Pump has run for 24-hours, with System Fill
active, & not yet reached CFP.
Check: System Pressure. Reset audible alarm.
Press Rest Key again to clear Alarm. Switch
System Fill ON if required.
Service Due Alarm
Service Period expired.
Ensure that the Pressurisation unit is serviced.
Low Water Alarm
Water Level in break tank low.
Check mains water inlet. Check ball valve
operation. Check Float switch operation.
High Water Alarm
Water level in break tank high.
Check ball valve operation. Check float switch
operation.
Pump Hunting
Settings incorrect for system. Pressure
Vessel/connection faulty
Check: Settings for Minimum Run & Start Delay;
Discharge valve; NRVs; Pressure vessel
operation & Connection; Transducer wiring
Pumps running
continuously
System Pressure not reaching CF.
Check: System for leaks; NRVs; Pumps;
Transducer & wiring. Check/Adjust System Leak
timer.
Transducer Fail
Excessive pressure rise or fall; Pressure not
changing with Pump running
Check: Discharge valve open; Transducer Wiring;
Reading Rises & Falls with pressure changes.

Wilo P260 Specifications

General

Brand	Wilo
Model	P260
Category	Water Pump
Language	English