Sun Yeh Electrical M Series, Operation Manual, Page: 34 / 75

【M Series】Multi-turn Electric Valve Actuator
31
2021.06

The actuator is not operated in the following condition and warning message will be
shown on the display.
Warning Message Description
a Main Power Fault
Main power failure (AC power failure).
b Please Set Limit Range
Abnormal Open / Close Limit setting or Open /
Close limits are not set.
c Handwheel Fault
Handwheel sensor signal failure.
d Handwheel Open
Handwheel lever open.
(At Manal Operation status)
e Encoder Fault
Encoder sensor signal failure.
f Driver Comm. Error
Abnormal motor driver module.
g Motor Drive Fault
Abnormal motor running.
h Motor Temp. Fault
Motor temperature sensing signal failure.
i MotorOverheat(Stop)
Motor temperature higher than 135
℃
(275
℉
).
j Driver Overheat
Motor power module (IGBT) temperature higher
than 125
℃
(257
℉
).
k EEPROM Fault
The PCBA module failure to save the data.

The following warning messages will be shown on the display but the motor still can be
operated.
Warning Message Operating Condition
a Over Limit Range
When actuator exceeds the limit value set in the
running direction, it needs to be operated in the
opposite direction.
b
Motor OH
(Speed Limit)
Motor temperature is higher than the setting
value thus the actuator is running at the lowest
speed.
c
Close Overload
Open Overload
When the torque switch is activated, the motor
will be stopped. The actuator could be operated
“Only” in the opposite direction.

When Encoder failure, the backup Encoder will start running to keep saving the travel
position during manual operation.
[
Local Operation - Stop
]