61
Zehnder Eversky
No.
Display
Class
Time
Threshold
Action
Conditions
Causes
(There may be several causes)
23
Overheating of
heating or de-
icing coil
(if electric heating
and/or de-icing
coil option)
A
5s
Off
The THS / THSD
overheating safety
thermostat of the heating
and/or de-icing electric
coil (type NC normally
closed) has been tripped
by going to the open
state for more than 5s,
meaning that the
temperature of the coil
has exceeded 90°C
(thermostat setting).
The DI2 input must be in
the closed state "Fer" if
there is no fault and in
the open state "Ouv" in
the event of an
overheating fault.
The THS / THSD
thermostat must be
manually reset by
pressing the reset button
on the thermostat body
directly.
Power failure while the electric battery
was active.
Low speed or normal speed setpoints
too low (30% minimum).
The supply air fan stopped
spontaneously (see "VAS fault") while
the electric coil was running at full
power at low flow rate.
Power solid state relay that supplies the
electric battery is faulty (on), and
continuously supplies the electric
battery whenever the fan unit is
powered.
Auxiliary contact of K1 blocked in open
state.
Auxiliary contact of KD blocked in open
state.
Faulty wiring/connection on the
auxiliary contact circuit of K1.
Faulty wiring/connection on the KD
auxiliary contact circuit.
Safety thermostats THS and THSD
- Faulty
- Poor electrical connection
27
Outside
temp. sensor
error
A
5s
Off
The analogue input AI2
has detected an
implausible signal (open
circuit or short circuit) for
more than 5s.
The machine is stopped.
To restart, the signal at
analogue input AI2 must
return to a normal range
and the alarm must be
acknowledged.
The SEG outside temperature sensor at
the outside air intake and/or its cable
and/or its connection to the controller
are defective (open circuit or short
circuit)
The SEG outside air temperature
sensor is incorrectly wired (see XVIII
GENERAL WIRING DIAGRAM).
35
Manual mode
C
5s
Operation
according to
the selected
manual mode.
The operating mode of
the machine is no longer
automatic and is
currently either in:
- Manual stop
- Or 1/2 manual speed
(=low speed)
- Or 1/1 manual speed
(normal speed)
The machine follows the
setpoint of the selected
manual operating mode.
The alarm is
automatically retired
when the manual
operating mode is
changed back to "auto".
