Q. I See One of the Following Error Codes on the LCD "LO HI E1 E2 E4 E5". What does it mean?

A. Error or Warning Codes may be diplayed on the LCD.  Here is the interpretation:

Warning and Error Codes

E1- The operational (ambient) temperature is BELOW specification range

E2 – The operational (ambient) temperature is ABOVE specification range

E4 – Sensor / circuit error (usually, this means the device needs to be repaired)

Lo – The temperature of the subject is BELOW specification range

Hi – The temperature of the subject is ABOVE specification range

E5 – Low Battery, needs to replace batteries immediately.  (Device will switch to sleep mode after 3 beeps.

There is no E3 error code.