Grindmaster RAPS400E - Manual (Page 13)

Page 13 Shuttle Brewers & Airpot/Shuttle Brewers
If you still need help, call our Technical Service Department at (502) 425-4776 or (800) 695-4500 (USA &
Canada only) Monday thru Friday 8 am - 8 pm EST or an authorized service center in your area. Please
have the model and serial numbers ready so that accurate information can be given. Prior authorization
must be obtained from Grindmaster Corporation’s Technical Service Department for all warranty claims.
Troubleshooting: Filling, Heating, and Brewing
Tank does not
heat. Low electrode faulty
or covered w/lime.
Level control faulty.
Thermostat faulty or
out of calibration.
Heater relay coil
faulty. (electric heat)
Heater contactor
contacts faulty.
Heater faulty.
Jumper from XL ter-
minal on level control
to metal body allows
heating.
Check for 120V be-
tween H and N ter-
minals on level control.
If OK, jumper between
XL and metal body and
check for 120V
be tween HEAT and N
terminals.
Make sure thermostat
is turned on. Jumper
across thermostat
allows heating.
Check for 120V
across contactor coil.
Check for heater vol-
tage between each
heater pole on con tact-
or, and different pole.
Check resistance
across elements with
wires disconnected.
Clean electrodes, check wiring. If
no remedy, replace electrodes.
If 120V is not at HEAT, replace level
control.
Recalibrate thermostat. If no reme-
dy or thermostat does not cycle,
replace thermostat.
If correct voltage, but contactor not
closing, replace contactor.
If no continuity across contactor
when it is closed, replace contactor.
If resistance is much different than
10 to 15 ohms, replace heater.
Problem Possible Cause Service Check Remedy
Heating Problems
The heating system consists of the following components:
• Liquid Level Control, located behind the front enclosure panel.
• Liquid Level Probes, located on the tank top, secured by wing nut, under the top cover.
• Thermostat, located on the tank or on the front of top control panel under top cover.
• Heater Relay, located in top control section under top cover.
• Heating Elements, located on tank top under top cover.
Recovery time is
very long.
Heater faulty.
Low temp/no brew
thermostat set too
high.
See above.
Water is above 190
degrees F, but HOT
WATER light is off.
See above.
Turn down brew thermostat, see
adjustments.