EVERSKY
™
MS-CDF-019
–
Manufacturing Nr: 22
0001→
Version B
Update: 2022/06/14
57/70
The thermostat is of the NC type (normally closed).
The contact is closed when the bulb temperature is
higher than +5°C and open when the temperature is
lower than +5°C.
The wiring or connections are defective.
15
High supply air
temp
A
30s
50°C
Stop
The supply air temperature measured on AI1 input
has exceeded the 50°C threshold for more than 30s.
The machine is stopped, the alarm must be manually
acknowledged and the temperature lowered in order
to restart the machine.
The supply air temperature setting is too high.
The supply air fan has stopped (see
“Malfunction supply air
fan”
) while the heating coil was running at full capacity.
The PT1000 temperature sensor and/or its cable are
defective
The power solid state relay that supplies the electric coil is
defective (passing) and supplies the electric coil
permanently as soon as the fan unit is powered (presence
of alarm (23)).
23
Electrical
heating coil or
electrical pre-
heating coil is
overheated
(if electrical
heating or pre-
heating coils
are present)
A
5s
Stop
The THS / THSD overheat safety thermostat of the
heating and/or defrosting electric coil (NC - normally
closed type) has triggered 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 "ON" if
there is no fault and in the open state "OFF" in case
of an overheating fault.
The THS / THSD thermostat must be reset manually
by pressing the reset button on the thermostat body.
Power failure while the electric battery was active.
Reduced speed or normal speed setpoints too low (30%
minimum).
The supply air fan stopped spontaneously (see
"Malfunction extract air fan") while the electric battery
was at full speed with a low flow rate.
Power solid state relay that supplies the electric battery is
defective (on), and permanently supplies the electric
battery as soon as the fan unit is powered.
Auxiliary contact of K1 or KD blocked in open state.
Faulty wiring/connection on the auxiliary contact circuit of
K1 or KD.
Safety thermostat THS / THSD:
- Faulty
- Poor electrical connection
