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Extension module AK-XM 204A / AK-XM 204B
Function
The module contains 8 relay outputs.
Supply voltage
The supply voltage to the module comes from the previous
module in the row.
AK-XM 204B only
Override of relay
Eight change-over switches at the front make it possible to
override the relay's function.
Either to position OFF or ON.
In position Auto the controller carries out the control.
Light-emitting diodes
There are two rows with LED's. They indicate the following:
Left row:
• Voltage supply to the controller
• Communication active with the bottom PC board (red = error)
• Status of outputs DO1 to DO8
Right row: (AK-XM 204B only):
• Override of relays
ON = override
OFF = no override
Fuses
Behind the upper part there is a fuse for each output.
Note
If the changeovers are used to override the compressor operation,
it is necessary to wire a safety relay into the circuit for oil manage-
ment. Without this safety relay, the controller will fail to stop the
compressor if it should run out of oil. See Regulating functions.
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Heat pump controller RS8GF202 © Danfoss 2015-08
AK-XM 204A
Max. 230 V
AC-1: max. 4 A (ohmic)
AC-15: max. 3 A (Inductive)
AK-XM 204B
Override of relay
AK-XM 204B
Keep the safety distance!
Low and high voltage
must not be connected to
the same output group
AK-HP 780
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