FAULT FINDING
PRESSURE HIGH The system pressure has exceeded the Pressure-High Alarm. The
pumps will STOP until the pressure drops below the Pressure-High Alarm
OFF Level.
Check that the Pressure-High Alarm setting has not been set too low.
Check that the capacity of the expansion tanks is adequate for the
system.
Check that the pre-charge pressure has been set correctly.
PRESSURE LOW The system pressure has dropped below the Pressure-Low Alarm setting.
This will NOT stop the pumps from running unless the Water Leak alarm
has cut in.
PUMP A FAULT
PUMP B FAULT
Indicates that either the pump-Overload has tripped (ADVANCED model)
or the respective Pump FUSE has blown.
PUMP TEST FAILURE
PUMP A FAULT
PUMP B FAULT
Displayed along with a respective indication of which pump has failed the
pump test.
Check whether the pump shaft is free to turn.
Check that the pumps are vented.
SENSOR ERROR Pressure sensor fault.
Check the cables to the pressure sensor.
SERVICE DUE The unit has reached the SERVICE DUE interval. It is important that an
engineer attends site to ins pect the unit, as soon as possible.
SYSTEM FAILURE Can be displayed along with SENSOR ERROR - in this case check the
Sensor or it's Cabling FIRST. If displayed just on its own, then the
controller could be faulty. Replace as a module.
SYSTEM LOCK Indicates the System has been Locked from operating.
WATER LEAK The pumps have exceeded the maximum time they are allowed to run in
any given hour. Reset this alarm by Powering-OFF and back again.
WATER LOW Sensor (Float Switch), low water level in break tank.
Check water level. Check ball valve, if level is low.
Check wiring to float switch if level is OK.
WATER LOW
WATER REFILLING
This not a fault condition, but is for information, and indicating that the
water has now satisfied the Sensor/Float but the controller is allowing
the tank to refill before operating the pump again. See the Water Low
Reset user Set-Up option, for the reset time.
Commercial Building Services
Southern & Northern Region: Tel: 08707 503888, Fax: 01942 605970
Scottish & N. Ireland Region: Tel: 01506 461666, Fax: 01506 461555
Domestic Building Services
Tel: 01525 775402, Fax: 01525 775236
Spares
Tel: 01942 263490, Fax: 01942 603462
Email: ukspares@grundfos.com
Service
Mobile Service : Tel: 08450 508100, Fax: 01942 602830
Service Workshop (Leigh): Tel: 01942 263627, Fax: 01942 603462
Office Addresses
Southern (Head) Office: Grovebury Road, Leighton Buzzard, Beds. LU7 4TL. Tel: 01525 850000 Fax: 01525 850011
Northern Office: Orford Court, Greenfold Way, Leigh, Lancs. WN7 3XJ
Scotland & N. Ireland Office: Flemming Road, Kirton Campus, Livingston,
West Lothian, Scotland EH54 7BN.
General Sales Enquiries: uk-sales@grundfos.com
Grundfos Group Website: www.grundfos.com
It is the continuing policy of Grundfos to develop and improve our products, and we
reserve the right to amend prices and specification without prior notice.
REF: GB/IMPRESS I&O/CBS/1007
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