Dantherm Silencio 600 Service Manual page 72

Fault finding guide,
Fail
Alarm
72
continued
A fail is activated on one of the following events:
• The heater is faulty – doesn't use current. Loss of mains power
• Fail on ambient air sensor – short or open circuit
• Smoke alarm input activated
• One of the external DC fans is stopped – no rotational pulses
• The internal DC fan is stopped – no rotational pulses
• Mains failure
An alarm is activated on one of the following events:
• Both the internal DC fans are stopped - no rotational pulses
• Both the external DC fans are stopped - no rotational pulses
• The compressor doesn't draw current – this due to a dropout in the HP/LP pressure
switch, the winding protector or the compressor in general
• Fail on the return air sensor – open or short circuited