CLIMATIC™ 50 User manual - Lennox
CLIMATIC™ 50 User manual - Lennox
CLIMATIC™ 50 User manual - Lennox
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Compressors shut down on LP Cutoff<br />
Description<br />
Error code: 117, 127, 137, 147<br />
The low pressure switch of the circuit has been open for 2 minutes, while one compressor in the Circuit has operated<br />
for 2 minutes.<br />
The low pressure switch of the Circuit has been open for 1 hour.<br />
Action<br />
� Immediate shut down of the compressors in the circuit.<br />
� Fault signalling.<br />
If a DS<strong>50</strong> is connected to the unit; Memorisation and diplay of all faults.<br />
Otherwise; Memorisation and display only of the 3rd daily fault.<br />
� Display of fault.<br />
117, Circuit 1.<br />
127, Circuit 2.<br />
137, Circuit 3.<br />
147, Circuit 4.<br />
Reset<br />
Automatic reset of the fault as soon as the low pressure becomes greater than the safety pressure switch cutoff limit<br />
The fault will no longer be reset automatically after 3 cutouts in the same day and must be reset <strong>manual</strong>ly.<br />
Note: The fault counter is cleared and reset every day at 10 am provided the maximum number of faults has<br />
not been reached.<br />
Possible causes Solving the problem<br />
Not enough refrigerant in the circuit Adjust the refrigerant charge<br />
Faulty expansion valve Check that the expansion valve is operating correctly<br />
Filter drier blocked Replace the filter drier<br />
Faulty low pressure switch Replace the low pressure switch<br />
CLIMATIC<strong>50</strong> – IOM – Rooftops/ Aircoolair CL<strong>50</strong>-ROOFTOPS-IOM-1107-E 41
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