BIFFI ICON3000 Service Manual

December 2021
Service Manual
MDE 252 Rev. 1
Troubleshooting
8
Section 2: Troubleshooting
2.2.5 Alarm on Local Display: Motor Thermostat
MOTOR THERMOSTAT ALARM
1. The contact of motor thermostat is open for high temperature in the motor windings. Any electrical
command is cleared.
2. Electrical controls of actuator becomes available when motor temperature decreases and contact of the
thermostat closes.
3. Switch off the actuator
4. Open the electric motor cover and verify with a multimeter if the contact between motor terminals TH1
and TH2 is open or closed.
1. The contact is open and the motor
temperature is low.
a. Replace the electric motor.
2. The contact is open and the motor
temperature is high.
a. Check operation duty of motor.
b. Check motor current
c. Check winding resistance of
each phase of stator.
In the above check are correct, replace the
electric motor.
The contact is closed and the motor is ok.
This means that the alarm is false.
In sequence:
1. Verify the cabling between motor
terminals Th1-Th2 and the power
card on connector CN23.
2. Verify the cabling between the
power card (CN22) and logic card
(CN12).
3. If the cabling are ne, replace the
power and/or logic card.
Contact terminals
TH1/TH2?
OPEN
CLOSED

BIFFI ICON3000 Specifications

General

Brand	BIFFI
Model	ICON3000
Category	Control Unit
Language	English