16 | Installation, Operating, and Maintenance Manual
Rev. 05JUL2016
Troubleshooting
Screen Color
Action / Display
Indication
Possible Cause / Solution
Blue backlight Any button is pressed
Blue backlight comes on for
30 seconds when a button
is pressed.
N/A
No light or
blue backlight
Display = “RUNNING”
Normal operation
N/A
Display = “1 PUMP”
Display = “2 PUMPS”
Display = “STOPPED”
Red
Display = “NO SENSOR”
No flow sensor connected
when in flow mode; no
thermistor connected when
in ∆T mode.
1.
Flow sensor not plugged in.
Plug in sensor; check installa-
tion and wiring.
2.
Flow sensor not set up in sen-
sor configuration menu. Select
proper sensors and EWT/LWT
location in sensor configura-
tion menu.
3.
Missing thermistors. Check
thermistor wiring at EWT, LWT,
and C terminals on UPC-GEO
circuit board.
Display = “NO PUMP”
Controller does not detect
a Magna GEO (var. spd.)
pump attached. Could also
indicate no power to pump.
1.
PWM Cable not attached to
pump or controller. Check
PWM cable at pump and con-
troller.
2.
Magna GEO does not have
power. Provide 230VAC power
to Magna GEO. Check Line and
Neutral connections on 230V
power. If the pump is wired to
the “T” side of the contactor,
the pump should be rewired to
the “L” side of the contactor.
Display = “BLOCKED”
Magna GEO feedback signal
“reports” to controller that
rotor is blocked.
Debris is blocking pump rotor.
Remove pump motor and clean
debris. Replace pump if necessary.
Display = “LOVOLT F”
Magna GEO feedback signal
“reports” to controller that
voltage is not sufficient to
run.
Incorrect power supplied to pump.
Supply correct input to pump.
Display = “RPM SENSOR”
Magna GEO feedback signal
“reports” to controller that
motor has RPM sensor
fault. Pump runs at reduced
speed.
Failed RPM sensor. Replace pump.
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