White S4A - PUMP SERVICE CHART cont.; Fuses blow but overload doesnt trip; Electric shock from water pipe; Pressure gauge oscillates, flow surges (snoring)

DAB Submersible Pump Installation Instructions 2013 rev 1 12
PUMP SERVICE CHART con’t.
THE TROUBLE IS?
WHAT TO LOOK FOR
Fuses blow but overload doesn't trip
Supply cable too small
Hydraulic overload
Fuses too small
Fuse receptacle dirty or corroded
Power spike
Loose connection in fuse box
Defective incoming power leads
Excessive motor starts per hour
Earth wire connected to wrong control box
terminal
Cable insulation failure
Voltage too high or low
Electric shock from water pipe
Defective (grounded) incoming power leads
Defective control box
Note: A motor down to earth or defective cable
will not cause a shock.
Earth wire connected to wrong control box
terminal
Pressure gauge oscillates, flow surges (snoring)
Water level too low in the well. (Flow through
pump greater than flow into well)
Electrolysis on motor and pump
Insufficient earth / earth leakage
Broken earth wire
NOTE: Always install borehole submersibles with ON/OFF switches and approved circuit breaker to protect
against motor damage and electrocution.