Koolance EXT-400SL-V2-R - Manual (Page 30)

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User Manual
8. The LED Display Panel shows 5 - 0 or 5 - 5...
5 - 0
(“S - O”): Sensor open. This indicates a temperature sensor can not be detected for a
given channel. If there is no sensor connected to a channel, this is its normal status.
5 - 5
(“S - S”): Sensor short. This indicates that the sensor may be faulty or electri-
cally bypassed. If the sensor is listed with an “S-S” status, the cooling system alarm
will sound. The sensor will need to be replaced. Please visit our support web page.