Technical data

22
SYMPTOMS
Pump will not start
Pump stops
Pump runs continuously
Noises in system
Pressure loss
CAUSE
Isolator switch open
Flow controller open
Circuit breaker open
Contactor stuck open
Pump connections loose
Control components poorly connected
Low supply voltage
Thermal sensor tripped
Pump seized
Flow controller open
Control contacts welded
Vibrating pipes
Noisy pump
Leaky pump seals
Leak in water circuit
Expansion membrane ruptured
REMEDY
Close isolator switch
Check controller
Trace and correct fault, reset circuit breaker
Replace contactor
Check and tighten pump electrical terminals
Check and tighten all connections
Check voltage and correct
Manually reset thermal sensor
Replace pump bearings
Check water pressure drops and filter and
evaporator for fouling
Replace control component at fault
Fix, check all hangers etc.
Check purge valves on pump
Check and change pump bearings
Replace
Check purge valves
Replace expansion tank
TROUBLESHOOTING CHART - HYDRAULIC KIT OPTION