Grindmaster ICB-300 Troubleshooting Guide, Problem, Possible Cause, Solution, Error Message, Page

AMERICAN METAL WARE® BREWERS

The following pages are provided to help determine the cause of problems with operation of the brewers and to indicate the appropriate solution for the problems. For each problem, the possible cause should be checked in the order shown until the exact nature of the problem is determined.

The following procedures must be performed by a qualified service technician.

TROUBLESHOOTING GUIDE

	Problem	Possible Cause	Solution
		ERROR MESSAGE
ER1		• Fill valve on for over 5 min. (This occurs during	• Check system for water leaks. Correct any
		initial fill on some units. See Initial Start-up)	leaks and reset controller.
ER2	• Thermistor failure or loose connections in	• Ensure that connector CN7 is securely
		thermistor circuit.	attached to controller and that the thermistor
			disconnect is securely connected. Secure
			connections and reset controller. If error
			reoccurs, replace thermistor.
		FILLING PROBLEMS
Overfilling water tank when power		• Fill valve not sealing properly.	• Check to see if water enters tank continuously
			(usually at a slow rate). Disassemble valve and
is OFF
			clean out debris. Valve may need a new
			plunger if seal is worn.
		• Fill valve installed backwards.	• Look for flow direction arrow on valve body. If
			arrow on valve is pointing toward water inlet,
			remove valve and install arrow pointing away
			from inlet.
		• High electrode coated with lime or faulty.	• Disconnect electrode wire at quick connect
Overfilling water tank when power			(red wire). Connect a wire from the quick
			connect to the cabinet body. If filling stops, this
is ON			is the error cause. Remove electrode
			assembly and clean the probes. If problem is
			not corrected, replace electrode assembly.
		• Connection from control board to tank body	• Check to ensure connection (yellow wire) is
		faulty.	secure. Make connection to tank secure.
		• Control board is faulty.	• Secure connection from control board to metal
			enclosure does not stop filling. Replace control
			board.
		• No electrical power to equipment.	• Check for proper voltage at terminal block.
			Check circuit breaker on supply circuit.
Tank does not refill			Establish electric power to unit.
		• No water supplied to equipment.	• Disconnect water supply line and ensure that
			water is provided to unit. Check to see that
			any and all valves in water line are open.
			Establish water supply to unit.
		• Water strainer clogged.	• Water pressure before strainer but not after.
			Remove and clean or replace strainer.
		• No power to control board.	• Check for 120V across transformer primary
			terminals by disconnecting the quick-connect
			for the red and white wires to the transformer
			and measuring voltage at this point. If there is
			not 120V across primary, proceed to step
			entitled “No power to control board and
			transformer not powered”. If there is 120V
			across primary, proceed to step entitled, “No
			power to control board and transformer
			powered”.
		• No power to control board and transformer not	• Ensure there is 120V across terminal L1 and N
		powered-connections not secure and/or circuit	posts. Check connections. Secure connections
		breaker tripped.	and reset circuit breaker on equipment.
		• No power to control board and transformer	• Disconnect quick disconnect on secondary
		powered.	side of transformer at quick disconnect
			between yellow, black, and blue wires. Check
			12Vac between black wire and other wires.
			Check 24Vac between blue and yellow wires.
			If there is no 12Vac between black wire and
			either blue or yellow wire or if there is not
			24Vac between the blue and yellow wires,
			replace transformer. If proper voltage
			exists, secure connection between 5 pin
			connector CN1 and Control board.

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