Lennox CLIMATIC 60 User Manual page 84

COMMUNICATION
ALARM 117, 217:
LOW PRESSURE, CUT OFF
Description
The suction temperature calculated by the LP pressure sensor is lower than the permitted threshold. The temperature has reached
-27.0°C (1 minute delayed in heating mode) while a compressor was running for 30 s. The alarm is disable during 1 minute if the
defrost procedure is running. In any case if the LP temperature reaches -37.0°C, the circuit is stopped immediately without time delay.
• Alarm 117: suction temperature too low on circuit 1,
• Alarm 217: suction temperature too low on circuit 2.
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 during 1 hour, and are automatically reset
every day at 6 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 operating.
ALARM 118, 218:
WATER EVAPORATOR, RISK OF FROSTING
Description
The suction pressure measured by the LP sensor is too low and may pose a risk for the water evaporator. These alarms are disabled if
the unit has electronic expansion valve (EEV) or if the glycol rate is greater than 45%. The LP pressure has reached the limit specifi ed
in the setting (3441) for 2 minutes while a compressor was running for at least 2 minutes. This alarm is disabled during 1 minute when
a compressor start or stop or during the defrost procedure.
• Alarm 118: risk of frosting the water evaporator by circuit 1,
• Alarm 218: risk of frosting the water evaporator by circuit 2.
Action
Immediate shut down of the complete circuit. The alarm is signalling.
Reset
Once the suction pressure is higher than the setting (3441) 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 during 1 hour,
and are automatically reset every day at 6 am. The third trip activates the fault report and must be manually reset.
Possible cause(s)
• Problem of refrigerant capacity
• Problem with the expansion valve.
Remedies
• Check the frigorifi c operating,
• Replace the expansion valve.
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CL60-AC CHILLER-IOM-1011-E