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22
TROUBLESHOOTING – MOTOR
HAZARDOUS VOLTAGE:
DISCONNECT
power cord before removing motor cover for service.
Electrical service
should be performed by trained personnel only.
KEYPAD/DISPLAY
PROBLEM
POSSIBLE CAUSE
SOLUTION
Display is blank
No AC power at receptacle
Check voltage of receptacle/controller
output voltage
Pump is off
Press ON/OFF key
Failed power supply
Check power supply; Green LED “ON” with
AC voltage applied
Check 12VDC output to board
No response to 4-20mA signal
Not in “AUTOMATIC”
Ensure display has a small LED light located
in upper left-hand corner indicating pump is
in “AUTOMATIC
Display reads “00” and does
Pump is in “AUTOMATIC” mode
Place pump in “MANUAL” mode
not respond when pressing
of operation
up/down keys
DC MOTOR
PROBLEM
POSSIBLE CAUSE
SOLUTION
Display working; pump is not
Worn motor brushes
Inspect brushes for wear, replace if needed
Failed DC motor
Replace DC gear motor if brushes are good
Pump cycles ON/OFF
Failed DC fan
Check fan operation; Replace as required
