Troubleshooting; Error Messages; Filling Problems - Grindmaster AM-344-04 Operation And Instruction Manual

Troubleshooting

The following pages are provided to help determine the cause of problems with operation of the brewers and to
indicate the appropriate solution for the problems. For each problem, the possible causes should be checked in
the order shown until the exact nature of the problem is determined.
The following procedures must be performed by a qualified service technician. Disconnect power to
machine before servicing.
Problem
ER1
ER2
ER3
ER4
Problem
Overfilling water
tank when power
is Off
Overfilling water
tank only when
power is On
Shuttle Brewers & Airpot/Shuttle Brewers

Error Messages

Possible Causes
• Fill valve on for over
6 min. (This occurs
during initial fill on some
units – see Initial
Start-up.)
• Thermistor failure or
loose connections in
thermistor circuit.
• Thermistor is reading
out of range.
• No heat is detected

Filling Problems

Possible Causes
• Fill valve not sealing
properly.
• High electrode coated
with lime or faulty.
• Connection from
control board to tank
body faulty.
• Control board is faulty.
Service Check
• Check system for
water leaks.
• Ensure that connector
is securely attached to
controller and that
thermistor is securely
connected.
• Check tank
temperature.
• See Heating Problems
Service Check
• Check to see if water
enters tank continuously
(usually at a slow rate).
• Disconnect electrode
wire at quick connect
(brown wire). Connect a
wire from the quick con-
nect to the cabinet body.
If filling stops, this is the
error cause.
• Check to ensure
connection (red
wire) is secure.
• Secure connection from
control board to metal
enclosure does not
stop filling.
Remedy
• Correct any leaks and reset
controller.
• Secure connections and reset
controller. If error reoccurs,
replace thermistor.
• Replace thermistor.
• See Heating Problems
Remedy
• Disassemble valve and clean
out debris. Valve may need to
be replaced.
• Remove electrode assembly
and clean the probes. If
problem is not corrected,
replace electrode assembly.
• Make connection to tank
secure.
• Replace control board.
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