Lennox CLIMATIC series User Manual page 53

COMMUNICATION
ALARM 091:
BLOWER OR EXHAUST FAN, FAILURE
Description
The fan motor control is no longer active.
• Alarm 091: the air conditioning fan motor or the exhaust fan motor control is no longer active,
Action
Immediate shut down of the complete unit. The alarm is signalling.
Reset
The alarm is manually reset.
Possible cause(s)
• Fire safety thermostat active
• Thermal motor protection devices activated,
• Problem with wiring connection,
• Fan motor damaged.
Remedies
• Reset the thermostat,
• Check the air system,
• Check the connection,
• Replace the fan motor.
ALARM 099:
FIRE / SMOKE, DETECTED
Description
The stand-alone detector switch (DAD) has detected the presence of smoke in the unit.
Action
Immediate shut down of the complete unit and fresh air damper opening (or closing with set point (3114)). The alarm is signalling.
Reset
The alarm is manually reset.
Possible cause(s)
• Problem with the DAD
Remedies
• Check the connection.
CLIMATIC RT_UNITARY-IOM-1508-E • 51 •