Eltorque QT Series User Manual

Operation
Page 46 of 86
User Manual QT250 and QT800, ID 2021 2.0 July 2018
The Eltorque actuator is a robust maintenance-free product, but you might
encounter some issues with the unit. Below is a list of the most common issues
that may occur and how to solve them. If you still have problems, please contact
Eltorque support for further help.
Table 11: Troubleshooting overview
Problem description
Cause and solution
No response from the actuator either on the
control system or if you connect with E3C.
No change in resistance on the hand wheel if
you cycle the power supply.
No power supply, check fuses and wiring.
Supply voltage can be checked using a voltage
meter.
L-N voltage should be 1-phase,110 – 240V AC,
50/60 Hz, Max 240 VA.
The actuator’s alarm output is active, on a bus
system it gives torque alarm.
The actuator attempts to move valve when a
control signal is given.
The valve operation torque is too high, please
check the torque by manual operation.
Be aware that foreign objects in the pipe can
block the valve and that valve torque changes
over time.
OR
The actuator torque has been set too low,
increase it by using the E3C configuration
software as described in the Eltorque E3C
Manual.
On bus control systems, torque can be adjusted
via the bus communication.
The actuator can operate the valve, but the
operation time is longer or shorter than desired.
Change the actuator’s speed by using the E3C
configuration software as described in the
Eltorque E3C Manual.
On bus control systems, speed can be adjusted
via the bus communication.
The actuator’s alarm output is active, on a bus
system it gives temperature alarm.
The actuator responds normally to control
signals.
The actuator’s internal temperature is
10 C/50 F or less from the motor current shut-
down limit.
If possible, allow the actuator to cool down by
leaving it in standby mode for 15 minutes or
more.
The actuator’s alarm output is active, on a bus
system it gives torque alarm.
The actuator responds only with a small position
change
The encoder cable is not properly connected or
could be damaged. Check the cable and
connector for corrosion or damage.
The actuator’s alarm output is active, on a bus
system it gives temperature alarm.
The actuator does not respond to control
signals.
The actuator has over-heated and the motor
current is shut down to prevent damage.
Make sure the surrounding temperature is within
limits and that the duty type requirements are
followed. See section 3.3Technical specification
on page 19 for more details.
The actuator with bus interface does not
respond to control signals.
The actuator responds normally when tested
with E3C.
Incorrect bus settings, please check the
configuration described in the Eltorque E3C
Manual.
OR
Bus control system is not wired or configured
correctly.

Eltorque QT Series Specifications

General

Brand	Eltorque
Model	QT Series
Category	Controller
Language	English