Pump Start-Up - Wilo Pwm Pump - Evinox ModuSat FS Series Installation Manual

6.5

Pump Start-up - Wilo PWM Pump

The Wilo Pulse-width modulation (PWM) pump features dry running protection to eliminate
burn out and provides compliance with the 2015 pump efficiency regulations.
Pump LED – Description of Status
LED Indicators
Lights green Pump in operation
Blinks quick PWM model:
green
Blinks red/ Pump in function
green but stopped
Blinks red Pump out of
function
LED off No power
Description of the pump
The pump consists of a hydraulic system, a
glandless pump motor with a permanent
magnet rotor, and an electronic control
module with an integrated frequency
converter. The control module provides speed
control by a PWM signal from the ModuSat
control board and indicator LED to display the
pump operating status.
Please note: When the unit is switched over
to heating mode the pump will run for 2 mins
prior to the heating PICV opening , this is not
a fault in the unit but a normal control function
as the HIU asses the current heating circuit
flow temperature.
Diagnosis
Pump runs
according
its setting
Pump in standby
Pump restarts by
itself after the fault
is disappeared
Pump stopped
(blocked)
No power to pump
Status
Normal operation
Normal operation
1. Low voltage
U<160 V
or
High voltage
U>253 V
2. Module overheating:
temperature
inside motor too
high
Pump does not
restart by itself due
to a permanent failure
1. Pump is not connected
to power supply
2. LED is damaged
3. Electronics are
damaged
Remedy
1. Check voltage
supply
195 V < U < 253 V
2. Check water and
ambient
temperature
Change pump
1. Check cable
connection
2. Check if pump is
running
Change pump
48