Operating instructions

The Safety Switch Regeneration Heater Has Been Actuated
Check the heater.
Check the fuses.
Short circuit check of the heater.
Error Bypass Flap
The bypass flap does not close or closes too slowly.
Check the bypass flap.
Error Valve Block
The valve block has not reached the proper position. The main switch is placed in
the off position.
Check the position of the valve block. Press the “ACK” key and put the main
switch in the on position immediately. If the valve block has not reached the
correct position within 1 minute, the main switch is again placed in the off position.
Colortronic Service.
Temperature Measurement Outgoing Air Defective
Check cables and sensor.
Temperature Measurement Return Air Defective
Check cables and sensor.
Excess Temperature Return Air
Check cables and sensor.
Check the return air cooler.
Temperature Measurement Drying Heater Defective
Check cables and sensor.
Check the power supply.
Short circuit check.
Dehumidified air dryer
Start-up 4-34