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M3 Sterilizer Troubleshooting Chart

Sterilizer has no power

Display / Symptom	Probable Cause	Check	Correction
Touchpad & display do not work. Switch failure under probable cause would only be on newer style PC boards.	Sterilizer not plugged in.	Check power cord connections at wall outlet and on back of sterilizer.	Secure power cord connections.
	Power switch turned off.	Check power switch.	Turn power switch on.
	No power at wall outlet.	Check voltage at wall outlet.	Reset facility circuit breaker. The sterilizer should be plugged into a dedicated 20 amp circuit.
	F1 fuse on PC board is blown or open.	Check F1 fuse for continuity.	Replace fuse.
	Inlet switch module failure.	Check inlet switch module. Inlet Switch Module Test	Perform continuity test on inlet switch module.

Sterilizer has power, but touchpad & display do not work.

Display / Symptom	Probable Cause	Check	Correction
Touchpad & display do not work.	F2 fuse on PC board is blown or open.	Check F2 fuse for continuity.	Replace fuse.
	Ribbon cable from J15 on main PC board to J3 on display PC board is loose or disconnected.	Check ribbon cable connections at J15 on main PC board & J3 on display PC board.	Secure ribbon cable connections.
	J15 / J3 ribbon cable has open lead(s).	Check J15 / J3 ribbon cable for continuity.	Replace ribbon cable.
	Main PC board is malfunctioning.	Check for 5 VDC between TP1 & TP4, and on J15 across pins 1 & 2 on main PC board.	If 5 VDC is not present at these points, replace main PC board.
Display is blank or undefined charcters & intermittent beeps.	Display PC board is malfunctioning	Check for 5 VDC between R1 & J1 on display PC board.	If 5 VDC is not present, replace display PC board.
Display works but touch pad doesn't.	Ribbon cable from J2 to touch pad is disconnected.	Check J2 Plug connection.	Assure J2 Plug pins are aligned and connected securely.
Display works but touch pad doesn't.	J2 ribbon cable to touch pad has open lead(s).	Check continuity of J2 ribbon cable and touch pad.	Replace touch pad and ribbon cable assembly.

Unit has power, but the door is not open in Select Cycle Mode, and there is no error code associated with this condition.

Display / Symptom	Probable Cause	Check	Correction
Display is normal.	Door motor connecting rod is broken.	Remove top cover and verify that the door motor connecting rod is intact.	Replace door motor connecting rod.