Grindmaster AMW B-Series Troubleshooting Guide, Problem, Possible Cause, Solution, Service Check

B-SERIES		Page 13
	TROUBLESHOOTING GUIDE
Problem	Possible Cause	Solution
Weak coffee	• Not enough coffee used	• Set to portion more coffee
	• Grind is too coarse	• Readjust to finer grind
	• Water not hot enough	• Check spray temp; should be greater than
		185°F/85°C
	• Coffee bed has dry areas	• Spray deflector broken or missing. Replace
Strong coffee	• Too much coffee used	• Use less coffee
Bitter coffee	• Grind is too fine	• Use a coarser grind
Grounds in coffee	• Paper filter collapsed during brewing	• Use proper filter
		• Position filter carefully
Brew basket overflowed	• Too much coffee	• Use no more than 3 1/2 oz. (100 grams) of
		coffee
	• Grind is too fine	• Use a coarser grind
	• Double batching	• You must dump old coffee and use fresh
		new filter for each brew
Unpleasant taste	• Water tank or brew basket needs cleaning	• Clean, sanitize (delime)
Quantity of coffee dispensed	• Lime scale build-up	• Delime machine
each throw is not the same	• Hose kinked	• Check hoses
	• Dump Valve not adjusted properly	• Turn screw on Dump Valve to open fully
	• Defective timer	• Check the length of time brewer runs
		with watch
Circuit breaker trips	• Insufficient current due to	• Plug unit directly into outlet. Do not use
	use of extension cord	extension cord
continuously
	• Insufficient current due to	• Designate single line for unit. Do not
	overloaded line	use multi-outlet box
Control board displays “P-O”	• Water supply turned off	• Turn water supply on, then reset power
	• Water fill valve on too long	• Clean or replace water fill valve
Control board displays “ER2”	• Problem with thermistor	• Replace if defective
Water boiling (or steaming)	• Temperature set too high	• Check settings with actual temperature
	• Defective thermistor
No lights are on	• No power to brewer	• Check power at source
(including warmer lights)	• Power switch turned off	• Turn switch on
	• Touch pad disconnected	• Reconnect touchpad
Too much or not enough water in server	• Water volume adjustment	• Readjust
Spray head dripping	• Lime build up in dump valve	• Delime unit
Hot water spigot dripping	• Faulty seal	• Replace seal
Hot water spigot not dispensing	• Tube limed up	• Delime tank
	• Defective valve seat	• Replace seat
Warmer failure	• Loss of power	• Check power source
	• Bus fuse (5 Amp) on controller board is blown	• Replace fuse
	• Defective warmer heater	• Replace defective heater
Water solenoids not working	• Bus fuse (1 Amp) on controller board is blown	• Replace fuse
One indicator light will not illuminate	• LED burned out	• Replace touchpad

Error Messages

Problem	Possible Causes	Service Check	Remedy
ER1	• Fill valve on for over	• Check system for	• Correct any leaks and reset controller.
	6 min. (This occurs	water leaks.
	during initial fill on some units –
	see Initial Start-up.)
ER2	• Thermistor failure or	• Ensure that connector	• Secure connections and reset controller. If
	loose connections in	is securely attached to controller	error reoccurs, replace thermistor.
	thermistor circuit.	and that thermistor is securely
		connected.
ER3	• Thermistor is reading	• Check tank	• Replace thermistor.
	out of range.	temperature.
ER4	• No heating is detected	• Verify power to heating element	• Repair as needed.
		and high limit operation

If you still need help, call an authorized dealer in your area or our Technical Service Department. You can reach Grindmaster Corporation’s Technical Service Department at 800-695-4500 (USA & Canada only) or 502-425-4776 Monday-Friday, 8:00 AM - 6:00 PM EST. Please have the model and serial number ready so that accurate information can be given.

Prior authorization must be obtained from Grindmaster Corporation’s Technical Services Department for all warranty claims.