Troubleshooting: Filling, Heating, and Brewing

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.

Problem

Possible Cause

Service Check

Remedy

 

 

 

 

 

 

 

 

Tank does not

Low electrode faulty

Jumper from XL ter-

Clean electrodes, check wiring. If

minal on level control

heat.

or covered w/lime.

no remedy, replace electrodes.

to metal body allows

 

 

 

 

 

heating.

 

 

 

 

 

 

Level control faulty.

Check for 120V be-

If 120V is not at HEAT, replace level

 

 

tween H and N ter-

control.

 

 

minals on level control.

 

 

 

 

 

If OK, jumper between

 

 

 

XL and metal body

 

 

 

and check for 120V

 

 

 

between HEAT and N

 

 

 

terminals.

 

 

 

 

 

 

Thermostat faulty or

Make sure thermostat

Recalibrate thermostat. If no reme-

 

out of calibration.

is turned on. Jumper

dy or thermostat does not cycle,

 

 

across thermostat

replace thermostat.

 

 

allows heating.

 

 

 

 

 

 

Heater relay coil

Check for 120V across

If correct voltage, but contactor not

 

faulty. (electric heat)

contactor coil.

closing, replace contactor.

 

 

 

 

 

 

 

Heater contactor

Check for heater vol-

If no continuity across contactor

 

contacts faulty.

tage between each

when it is closed, replace contactor.

 

 

heater pole on contact-

 

 

 

or, and different pole.

 

 

 

 

 

 

Heater faulty.

Check resistance

If resistance is much different than

 

 

across elements with

10 to 15 ohms, replace heater.

 

 

wires disconnected.

 

 

 

 

 

Recovery time is

Heater faulty.

See above.

See above.

 

 

 

very long.

 

 

 

Low temp/no brew

Water is above 190

Turn down brew thermostat, see

 

 

thermostat set too

degrees F, but HOT

adjustments.

 

high.

WATER light is off.

 

 

 

 

 

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.

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Grindmaster RAPS300E, RAP400E, RAP300E, RAPS400E instruction manual Recovery time is

P300E, RAPS400E, P400E, RAP300E, RAP400E specifications

The Grindmaster RAP300E, RAP400E, P400E, RAPS400E, and RAPS300E are advanced coffee grinding machines designed for high-performance use in cafés, restaurants, and coffee shops. These models incorporate innovative technologies that cater to the increasing demand for efficiency and precision in coffee preparation.

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