Maico WS 470 Series Operating Instructions Manual page 66

UK | 18 Faults
18.4 Information
The latest information is displayed
along with the time and date.
Note
Furnace pressure
monitor triggered
Switching test
active
Forced operation
active
Frost protection
volumetric flow-
reduction
Max. humidity value
limit exceeded
Volumetric flow
measurement active
Brine EHE,
low cooling
capacity
66
Description
The furnace safety
pressure monitor
was tripped by an
impermissible partial
vacuum.
The unit switches off.
A switching test is
being performed.
Cyclic forced operation
active. Any pumps and
servomotors present
are activated briefly to
avoid them seizing up.
The heating output of
the PTC heat regis-
ter is too low for the
current volumetric flow
and/or current outside
temperature.
The volumetric flow is
therefore reduced to
achieve the minimum
air inlet temperature
needed for frost pro-
tection.
The set max. humidity
value limit
was exceeded, excess
humidity protection
(increase in volumetric
flow) is active.
Fans are operated in
nominal ventilation
ventilation level for a
maximum of 3 hours.
The cooling capacity
of the brine EHE is too
low. There is no cool-
ing effect  pump is
blocked for one hour.
Note
Communication
EnOcean
Communication
KNX
Communication
internet
Communication
ModBus
External safety
shutdown
Description
There is no commu-
nication between the
EnOcean plug-in mod-
ule and basic circuit
board.
There is no commu-
nication between the
KNX plug-in module
and basic circuit
board.
There is no com-
munication with the
internet.
There is no communi-
cation
with the ModBus
components.
A connected external
safety contact has
tripped (terminal X2).
There is no bridge
on the control circuit
board.
The unit switches off!