Blocked adjustment by the valve
closing;
Active alarm relay output if enabled
by parameter;
Enable the buzzer;
icon flashes;
Code of alarm on the display.
ACF1 alarm:
• STAND-ALONE: valve configured to operate in cooling and heating but no digital input
configured as cooling or heating selection
• Two valves configured for the same circuit and configured to work both in the same mode
(both only chiller, both only heat pump, both chiller and heat pump)
• Two valves configured for the same circuit and at least one is configured to operate in chiller
and heat pump
11. Parameter programming key - HotKey 4K
The HotKey 4K programming key allows you to program the parameters of the IEV valve driver.
The HotKey 4K must be inserted into the 5-pin connector of the TTL serial port. The possible
operations are Downloading (loading parameters from the key to the controller) or Uploading
(downloading parameters from the controller to the key).