Koei Unic - 05, Operation Manual

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11. TROUBLE SHOOTING
TROUBLE AND PROBABLE CAUSE SOLUTION
Motor does not start up
Power is not supplied Supply power
Wire is broken, or terminal is open Replace wire, or re-connect terminal
Voltage is different or too low Check terminal voltage
Over current protector worked
(Ambient Temperature is too high or valve
is constrained)
Lower ambient temperature
Check manually open / close action
Limit switch is defective Replace limit switch
Limit switch adjustment is not proper Re-adjust limit switch
Limit dog adjustment is not proper Re-adjust limit dog
Motor coil or lead wire is broken Renew actuator
Motor is constrained
Limit switch is set beyond the range Make re-adjustment
Mechanical stopper setting is not correct Make re-adjustment
Stopping at an intermediate position Make re-adjustment
Signal does not output
Limit switch is not normal Re-place limit switch
Limit switch adjustment is not proper Make re-adjustment
* For other situation of troubles than the above, please refer to our Sales Dept.
Optional functions
Potentiometer 135 Ω , 500 Ω or 1K Ω
Torque limiter Close or Close / Open (Unic-05 = Close only)
Space heater
R / I converter
4 ~ 20mA DC output
Speed control unit Variable range 30 ~ 180 secs. (Unic-05 excepted)
Declutch type hand wheel