Troubleshooting Suggestions

If the E-Max™ goes into the error diagnostic mode as outlined below, it will likely be necessary to reset the brewer in order to test individual components. Note the reset procedure below:

*For the first four error modes, press and hold CANCEL for 3 seconds, or RE-ENERGIZE the brewer by disconnecting from electric power for 5 seconds, then reconnecting.

*From “VALVE FAULT”, the brewer must be RE-ENERGIZED! Using the CANCEL button will not reset the brewer from “Valve Fault”.

The Test Program will also assist in isolating and testing specific components. As an example to test the three main components in the heater system, go to the test program and proceed to turn the “heater on”. Use a meter or test light to determine if power is getting to and from: the triac, the high limit and the element.

ERROR MESSAGE		CAUSE	SUGGESTIONS FOR REMEDIAL ACTION
1.	“Probe/Heater”	Controller has turned	1.	Temp Probe may not be connected properly, or may be defective. CHECK &
	Error	heating element on for 5		CORRECT. To test probe, go to Test Program and view probe value. A value
	RESET by	minutes without sensing a		of over 155 indicates a defective probe; a value of under 15 indicates a bad
	holding	+2ºF change in water		connection of the probe to the board. With an ohmmeter measure resistance of
	CANCEL switch	temperature.		probe. At 212ºF, resistance is approx. 2,000Ω. If less than 1800Ω at room
	for 3 seconds			temperature, probe is defective.
			2.	May be boiling due to high altitude (boiling point below Brew Temp.) or Triac
				has failed ON and hi-limit has interrupted power to heating element. REDUCE
				BREW TEMP. CHECK TRIAC; REPLACE IF DEFECTIVE.
			3.	Heating element defective. CHECK ELEMENT; REPLACE IF DEFECTIVE.
			4.	Hi-limit thermostat may be cutting out at too low a temperature. CHECK HI-
				LIMIT THERMOSTAT; REPLACE IF DEFECTIVE. (Note; hi-limit will reset
				itself if allowed to cool by 30ºF, making troubleshooting a challenge as the brewer
				cools then functions normally.)
			5.	Heating element may be encrusted with lime or scale build-up. DELIME BREWER
				AS DETAILED ON PAGE 16.
2.	“Overheat” Error	Water temperature has	1.	Brew Temperature may be set too close to Maximum Temperature. Brew
	RESET by	exceeded Maximum Water		Temperature should be at least 5ºF below Maximum Water Temperature.
	holding	Temperature programmed		LOWER BREW TEMPERATURE or RAISE MAXIMUM TEMPERATURE
	CANCEL switch	into “Machine Settings”		(Software versions after May, 1999 enforce the 5ºF differential)
	for 3 seconds	menu.	2.	Triac has failed ON; element continues to heat even when controller is OFF.
				CHECK TRIAC; REPLACE IF DEFECTIVE.
			3.	Temp Probe defective. See probe test procedure in Item #1 above. CHECK
				PROBE; REPLACE IF DEFECTIVE.
3.	“No Water	Inlet valve energized but	1.	Sleeve on water level sensor is too long, or sensor is not pushed down fully.
	Sensed” Error	no water is sensed during		Sensor should extend beyond sleeve a minimum of ¼” to a maximum of l”.
	RESET by	regular operation for 60		REMOVE TANK LID, CUT SLEEVE TO PROPER LENGTH. ENSURE SENSOR
	holding	seconds; or.		IS PUSHED DOWN ALL THE WAY.
	CANCEL switch	no water sensed during	2.	Wiring to water level sensor disconnected or defective; or, sensor pulled out of
	for 3 seconds	start-up (manual or timed)		tank. CHECK & CORRECT.
		for 4½ minutes.	3.	Water level sensor may be encrusted with lime build-up. CLEAN SENSOR.
			4.	Water supply may be OFF. CHECK & RESTORE WATER SUPPLY.
4.	“Keyswitch	A switch on the keypad	1.	Switch has been accidentally held for 10 or more seconds. RELEASE SWITCH
	Locked” Error	has been held down for	2.	Defective keypad. PRESS & HOLD “CANCEL” FOR 3 SECONDS. Observe
	RESET as	more than 10 seconds.		brewer to determine if problem persists. (Note: available on software versions
	above			MFW 275 Rev. 3.4 and later versions only).
5.	“Valve Fault”	Detection of a problem with	1.	Wiring to either inlet or outlet valve not properly connected. CHECK WIRING AND
	Error	the valve switching system,		CONNECTIONS.
	RESET by	or with the wiring to the	2.	The controller has two switches for each valve and one or both has been detected
	disconnecting/	valves.		as failing ON. (This prevents the brewer from operating unless both switches are
	reconnecting			working properly.) REPLACE CONTROLLER.
	electric power

TROUBLESHOOTING SUGGESTIONS

CAUSE

SUGGESTIONS FOR REMEDIAL ACTION

BREW TEMP. CHECK TRIAC; REPLACE IF DEFECTIVE.

AS DETAILED ON PAGE 16.

PROBE; REPLACE IF DEFECTIVE.

IS PUSHED DOWN ALL THE WAY.

above

MFW 275 Rev. 3.4 and later versions only).

“Valve Fault”

CONNECTIONS.