gledhill TEC140-OV Installation & Servicing Instructions Manual page 47

SERVICING AND MAINTENANCE
Check pump electrical circuits
LED
Lights green Normal running
Blinks quick green Normal stopped
Blinks red/ green Abnormal running mode
-pump stopped but still
Blinks red Pump out of function
LED off No power supply
Check plumbing components
CW In line filter
Thermal store return
check valve + return
servicing valve
Meaning
Pump runs according
Pump in standby
The pump has stopped
due to external failure
functional
Pump restarts by itself
after the fault has
disappeared
Pump stopped (blocked)
No voltage on electronics Pump is not connected to
Isolate the CW mains supply at the servicing valve
Open HW taps to relieve the pressure
Undo securing nut ensuring that any remaining water is collected
Remove filter and clean it
The flow regulator can be checked at the same time by removing the upper pipe section.
Isolate both servicing valves
Drain water from the section between the servicing valves
Remove the bottom pipe section
Check for free movement of the check valve incorporated in the body. Remove and replace if the check
valve sticks.
Diagnosis
Normal operation
PWM input
Under voltage U<160 V
Over voltage U>253 V
Pump overheating:
temperature inside motor
Over speed:
the pump rotor is driven
by an external flow above
the maximum allowed
Over current:
the stator winding is in
short circuit due to water
Overload of motor:
friction due to particles
and/or impeller blocked
with debris
the pumps is fully
blocked due to debris in
Faulty electronic module
and/or faulty motor
power supply
LED is damaged
Electronics are damaged
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Cause
Check voltage supply
or 195 V <U< 253 V
Check water and
ambient temperature
too high
Ensure that there is no
other external flow (other
pump running) on
value
Check for leakage
application on
application
Check installation water
quality, clean system if
Blockage: Check for blockage.
Turn ON/OFF to reset
the pump by unplugging
system the power supply
If the pumps still blinking
red after a power reset
then replace the pump
Check cable connection
Check if pump is running
Replace pump
FAULT FINDING
Remedy
n/a
n/a
system
debris