CIAT AirControl CTA Manuel De Régulation page 130

Fault
Return air motor
Burner
Overheating of the
combustion chamber
Variable speed
rotary heat recovery unit
Heat recovery unit fouled
Sources
Return air fan power and
control circuit
ID9
Ignition transformer
ID11
Overheating thermostat
ID12
Variable speed rotary recovery
module control
ID13
Heat exchanger fouling
pressure sensor
0-1000 Pa
B8
Causes
- Embedded thermistor faulty
- Circuit breaker (QV2)
- Current too high
- Contactor coil (KV2)
- Ignition failure
- Air temperature, downstream of the
combustion chamber, too high
- Thermostat faulty
- Variable speed rotary recovery module
fault
- Fouling level greater than the setpoint
EN - 64
Solutions
- See causes
- Reset or replace
- Monitor starting current
- Replace coil or contactor
- See causes
- See causes
- See causes
- Clean the heat exchanger