Lennox CLIMATIC 60 User Manual page 86

COMMUNICATION
ALARM 127, 227:
MOP OPERARTING PRESSURE, FAULTY
Description
The suction pressure measured by the electronic expansion valve driver (EVD) is outside a permitted range.
• Alarm 127: most operating pressure on circuit 1,
• Alarm 227: most operating pressure on circuit 2.
Action
The circuit is still running. The alarm is signalling.
Reset
The alarm is automatically reset.
Possible cause(s)
• Problem of refrigerant capacity
Remedies
• Check the frigorifi c operating,
ALARM 128, 228:
LOP - LOW OPERARTING PRESSURE, FAULTY
Description
The suction pressure measured by the electronic expansion valve driver (EVD) is outside a permitted range.
• Alarm 128: low operating pressure on circuit 1,
• Alarm 228: low operating pressure on circuit 2.
Action
The circuit is still running. The alarm is signalling.
Reset
The alarm is automatically reset.
Possible cause(s)
• Problem of refrigerant capacity.
Remedies
• Check the frigorifi c operating.
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CL60-AC CHILLER-IOM-1011-E