EVERSKY
™
MS-CDF-019
–
Manufacturing Nr: 22
0001→
Version B
Update: 2022/06/14
55/70
XX.7.
List and meaning of alarms
nr
Display
Class
Delay
Threshold
Action
Conditions
Causes
(The causes can be cumulative)
1
Malfunction
supply air fan
A
30s
DEPS Pressure
switch setting
value.
Stop
The contact of the supply fan pressure switch has
remained open for more than 30s during normal
operation of the unit.
The UDI2 input must be in the closed state "ON"
when the central ventilation unit is in operation, in
the open state "OFF" when the unit is off.
The pressure switch is of the NO type (normally
open).
Motor of the supply air fan:
- Defective
- 0-10V control signal reversed
- Faulty electrical wiring/connection
Supply fan control pressure switch:
- Faulty
- Incorrect electrical connection
- Incorrect pneumatic connection
- Incorrect setting (factory setting = 25Pa)
- Incorrect electrical wiring/connection
Transparent pressure switch tubes for fan operation
control:
- Wrong connection
- Presence of internal condensation water. This may be due
to prolonged shutdown of the unit, or repeated/too many
on/off cycles. Adjust the machine for continuous
operation.
- Foreign matter or dust in the tube or pressure tap.
The reduced speed and/or normal speed setpoint is too
low, and the fan speed signal does not achieve sufficient
pressure to switch on the fan run control pressure switch.
RMS motorised supply damper remains in closed position.
Ductwork obstructed.
2
Malfunction
extract air fan
A
30s
DEPR
Pressure
switch setting
value.
Stop
The contact of the extract fan pressure switch has
remained open for more than 30s during normal
operation of the unit.
The UDI3 input must be in the closed state "ON"
when the central ventilation unit is in operation, in
the open state "OFF" when the unit is off.
Motor of the extract air fan:
- Defective
- 0-10V control signal reversed
- Faulty electrical wiring/connection
Extract fan control pressure switch:
- Faulty
