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.