Grindmaster RAP400E Troubleshooting Filling, Heating, and Brewing, there is always some, brew

Troubleshooting: Filling, Heating, and Brewing

Brewing Problems

The brewing system consists of the following components:

•Start and Stop, switches located in the top control panel.

•Brew Timer, located in the top control section under the top cover.

•Brew Valve, located in the top control section under the top cover.

Problem	Possible Cause	Service Check	Remedy
Brew volume too	Timer out of	Compare timer setting to	Adjust timer.
large or too small.	adjustment.	factory setting chart.
	Pressure not	Fill valve should cycle on	If fill valve does not cycle or takes
		and off frequently during	too long to refill, be sure water line
	adequate at urn.
		brew cycle when all brew	is 3/8" and pressure is uninterrupted
		heads are used.	30psi.
	Spray head clogged.	Visual	Clean all holes.
	Brew valves clogged	Visual, inspect brew	Clean lime from valve. Seat cup or
	with lime.
		valve.
	Timer faulty.	Brew time does match	entire valve may need replacement.
		timer setting. Timer not	Replace timer.
		adjustable.
Brew volume erratic.	Timer faulty.	Measure brew time for	If time is different from batch to
(there is always some		inconsistencies.	batch, replace timer.
small variation from
	Pressure fluctuations	Check pressure at urn	Plumb water line so its pressure is
batch to batch)
	at urn.
		inlet.	not influenced by other appliances.
Brew will not	Circuit breaker	If circuit breaker button	If tripped, find cause and reset. If
start.	tripped or faulty.	is out, breaker is tripped.	faulty, replace.
		Check 120V across	If 120V is across brew valve, but brew
	Brew valve faulty.		valve doesn't open, replace coil or
		brew valve.
			valve.
		Check for continuity	If no continuity, replace switch.
	Stop switch faulty.	across stop switch
		when not pressed.
	Start switch faulty.	Check 120V between	If start switch does not provide 120V
		S.S. and N on timer
			start signal, replace switch.
		when start is pressed.
	Low temp/no brew	Water is above 190°F	Turn down brew thermostat, see
	thermostat set too	(88°C), but HOT	adjustments.
	high.	WATER light is off.
	Timer faulty.	Check 120V between H	If no 120V BREW output from timer,
		and N on timer. If OK,	replace timer.
		check for 120V between
		BREW and N on timer
		after pressing start.
Spray head will not	Boiling tank.	If drip is from right	Turn down thermostat. If that doesn't
stop dripping water.		side, check for water	cure, check for faulty thermostat or
(spray heads normally		from overflow outlet at	heater relay.
drip slightly after		top of tank.
brew)	Limed up brew valve.	Visual check of valve.	Clean valve. Valve seal or entire
			valve may need replacement.

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