Grindmaster RAPS400E - Manual (Page 14)

Page 14 Shuttle Brewers & Airpot/Shuttle Brewers
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.
Brew volume too
large or too small. Timer out of
adjustment.
Pressure not
ad e quate at urn.
Spray head clogged.
Brew valves clogged
with lime.
Timer faulty.
Compare timer setting to
factory setting chart.
Fill valve should cycle on
and off frequently during
brew cycle when all brew
heads are used.
Visual
Visual, inspect brew
valve.
Brew time does match
timer setting. Timer not
adjustable.
Adjust timer.
If fill valve does not cycle or takes
too long to refill, be sure water line
is 3/8" and pressure is uninterrupted
30psi.
Clean all holes.
Clean lime from valve. Seat cup or
entire valve may need replacement.
Replace timer.
Problem Possible Cause Service Check Remedy
Brew volume erratic.
(there is always some
small vari a tion from
batch to batch)
Timer faulty.
Pressure fluctuations
at urn.
Measure brew time for
inconsistencies.
Check pressure at urn
inlet.
If time is different from batch to
batch, replace timer.
Plumb water line so its pressure is
not influenced by other appliances.
Brew will not
start. Circuit breaker
tripped or faulty.
Brew valve faulty.
Stop switch faulty.
Start switch faulty.
Low temp/no brew
thermostat set too
high.
Timer faulty.
If circuit breaker button
is out, breaker is tripped.
Check 120V across
brew valve.
Check for con ti nu ity
across stop switch
when not pressed.
Check 120V between
S.S. and N on timer
when start is pressed.
Water is above 190°F
(88°C), but HOT
WATER light is off.
Check 120V between H
and N on timer. If OK,
check for 120V between
BREW and N on timer
after pressing start.
If tripped, find cause and reset. If
faulty, replace.
If 120V is across brew valve, but brew
valve doesn't open, replace coil or
valve.
If no continuity, replace switch.
If start switch does not provide 120V
start signal, replace switch.
Turn down brew thermostat, see
adjustments.
If no 120V BREW output from timer,
replace timer.
Spray head will not
stop dripping water.
(spray heads normally
drip slightly after
brew)
Boiling tank.
Limed up brew valve.
If drip is from right
side, check for water
from overflow outlet at
top of tank.
Visual check of valve.
Turn down thermostat. If that doesn't
cure, check for faulty thermostat or
heater relay.
Clean valve. Valve seal or entire
valve may need replacement.