Lennox CLIMATIC series User Manual page 56

COMMUNICATION
ALARM 116, 216, 316:
REVERSING VALVE, BLOCKED
Description
The CLIMATIC hasn't measured a difference of pressure of 2 bars for 5 s, while a compressor was running for 30 s.
• Alarm n16: reversing valve blocked on circuit n,
Action
Immediate shut down of the complete circuit. The alarm is signalling.
Reset
Once the circuit has been stopped for 2 minutes, the alarm is automatically deleted. Up to 3 trips can occur during a day and are
saved in the alarm history. The two fi rst trips don't give the alarm alert, and the alarm counter is reset every day at 11 am. The third
trip activates the fault report and must be manually reset.
Possible cause(s)
• Problem with wiring connection,
• Problem of reversing valve.
Remedies
• Check the wiring connection,
• Replace the reversing valve.
ALARM 117, 217, 317:
LOW OPERARTING PRESSURE, FAULTY
Description
The suction temperature calculated by the LP pressure sensor is lower than the permitted threshold. The temperature has reached
-27.0°C for more than 2 mn while a compressor is running for 2 mn. The alarm is disable during the defrost procédure.
• Alarm n17: suction temperature too low on circuit n,
Action
Immediate shut down of the complete circuit. The alarm is signalling.
Reset
Once the circuit has been stopped for 2 minutes, the alarm is automatically deleted. Up to 3 trips can occur during a day and are saved
in the alarm history. The two fi rst trips don't give the alarm alert except if a trip is still present for 1 hour, and the alarm counter is reset
every day at 11 am. The third trip activates the fault report and must be manually reset.
Possible cause(s)
• Problem of refrigerant capacity.
Remedies
• Check the frigorifi c system operation.
• 54 • CLIMATIC RT_UNITARY-IOM-1508-E