Troubleshooting Tips; The Valve Does Not Appear To Close Or Stay Closed Completely; The Valve Does Not Appear To Be Moving To The Correct Position - Danfoss ICM User Manual

ICM and ICMTS Motorized Valves with ICAD Actuators
The alarms and service values work together to allow the user to quickly diagnose the source of operating issues.
The most common alarms are:
A1: The user has not selected the valve type. Each ICAD actuator is capable of driving several di erent valve sizes.
Upon installation of the valve, it is mandatory that the user select the valve size from parameter ID8 or choose
Automatic detection with parameter ID9.
A3: The control signal is out of the range of the selected values. The most common causes of this problem are:
1. Improper wiring
2.
Incorrect selection of control signal (parameter ID3)
3. The source of the control signal is not outputting the correct type of signal
A9: The valve is locked, disconnect and remove motor. Use magnetic tool to slowly open/close the valve thru the
full range. There should be at no point a sticking/tight spot. You may need to remove the valve bonnet/module to
clean debris or replace the bonnet/module if it is damaged. If A9 alarm continues please contact Danfoss with
application details.
Of course, there are numerous other alarm messages designed to protect the equipment and help to diagnose
problems as pro-actively as possible. Most of these alarms are fairly self-explanatory.

Troubleshooting Tips

The valve does not appear to close or stay closed completely

• The display shows 0% opening degree but the valve can be driven further closed with the manual tool
◦ Solution: Recalibrate the valve. In addition, if the manual tool has been used to open or close the valve, the valve
should turn very easily. If there appears to be resistance in opening or closing the valve, replace the module.
• The display shows 0% opening degree and the valve cannot be driven closed any further with the manual tool
◦ Solution: Pull the function module and check to ensure that there are 2 o-rings on the module for ICM 25 and
larger. For size ICM 20, make sure valve seat is installed

The valve does not appear to be moving to the correct position

• Check service value ID34. This is the mA input from the control system. The degree of opening is linearly
proportional to the mA input. (For example, if 4–20 mA was chosen as the input range and the service value shows
12 mA, the valve should be 50% open.)
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