Alarm (ALM) messages by PLC
Code
Message
Reason
Action
VDA0_1M002MFI
ALM, Water
preheater 2 control
center fault
Water preheater
overcurrent/shortcircu
it tripped
Check the overcurrent/shortcircuit
relay
VDA0_1M002AFI
ALM, Water
preheater 2
Start/Stop fault
Water preheater
activation is not
according to given
command
Check the functionality of the main
contactor, Check the wiring for
running information and start/stop
commands
CFC0_1A100ALI
ALM, WECS
communication
failure
The PLC is not able
to establish
communication to
WECS
Check WECS power supply, Check
the profibus communication
(cabling and terminating resistors)
34SG-200414-04
Operating Troubles