Data Sheet for Product

MVL661… Modulating Refrigerant Valves Technical Instructions
Valves with Magnetic Actuator Document Number 155-400
May 11, 2016
Page 5
Signal priority
1. Forced control signal ZC
2. Signal input Y and/or minimum .stroke setting with potentiometer Rv possible.
Calibration
The printed circuit board of the MVL661… Series has a slot to facilitate calibration. To
calibrate, insert a screwdriver in the slot so that the contacts inside are connected. As a
result, the valve will first be fully closed and then fully opened.
Calibration matches the electronics to the valve mechanism.
During calibration, the green LED flashes for about 10 seconds; see Table 2.
Figure 1. Calibration Slot.
NOTE: MVL661..-.. Refrigerant Valves are supplied fully calibrated.
When is calibration
required?
Execute a calibration after replacing the electronics, when the red LED is lit or flashing
or when the valve is leaking (at seat).
Table 2. Indication of Operating State.
LED
Indication
Operating State,
Function
Remarks, Troubleshooting
Green
Lit
Control mode
Automatic operation; everything is OK.
Flashing
Calibration in
progress
Wait until calibration is finished
(green or red LED will be lit).
Red
Lit
Calibration error
Internal error
Recalibrate (operate button in opening 1×).
Replace electronics module.
Flashing
Main fault
Check electric main network (outside the
frequency or voltage range).
Both
Dark
No power supply
Electronics faulty
Check electric main network, check wiring
Replace electronics module.