117 Probe Error (Check Alarm)

Thermo King Alarm Code

Description	Corrective Action
Probe Error (Check Alarm) Occurs during Pretrip (PTI) test or Probe Test failed in CHilled mode Temperature difference between LH supply and RD supply sensors is too high (0.5 C [1.0 F] difference maximum) Indicates: Incorrect temperature reading on one sensor Supply air sensor not placed in air flow stream	Check sensor connections. Check sensor resistance of each sensor. Resistance must be 2,000 ohms at 25 C (77 F). Check left hand and right hand supply air sensor locations.