A8D1 : No Current Gun 1

To avoid serious injury follow all warnings and instructions in the manual. Wear appropriate personal protective equipment.

Check fuses F3 and F4 or F7 and F8 on MZLP that controls the error channel.
Check that electrical plug on hose is plugged into back of MZLP.
Check continuity of hose pin A gun end to J on MZLP connector end of hose and pin C on gun end to pin A on the MZLP end of the hose. Reading should be 0-1 ohm. Replace hose if measurement is outside this range.
If system only uses one hose and gun, electrical connector of the heated hose must be plugged into channel 1 of the MZLP.