Grindmaster AM-344-04 - Manual (Page 17)

Shuttle Brewers & Airpot/Shuttle Brewers Page 17
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.
Error Messages
Problem Possible Causes Service Check Remedy
ER1 • Fill valve on for over
6 min. (This occurs
during initial fill on some
units – see Initial
Start-up.)
• Check system for
water leaks.
• Correct any leaks and reset
controller.
ER2 • Thermistor failure or
loose connections in
thermistor circuit.
• Ensure that connector
is securely attached to
controller and that
thermistor is securely
connected.
• Secure connections and reset
controller. If error reoccurs,
replace thermistor.
ER3 • Thermistor is reading
out of range.
• Check tank
temperature.
• Replace thermistor.
ER4 • No heat is detected • See Heating Problems • See Heating Problems
Filling Problems
Problem Possible Causes Service Check Remedy
Overfilling water
tank when power
is Off • Fill valve not sealing
properly.
• Check to see if water
enters tank continuously
(usually at a slow rate).
• Disassemble valve and clean
out debris. Valve may need to
be replaced.
Overfilling water
tank only when
power is On • High electrode coated
with lime or faulty.
• Connection from
control board to tank
body faulty.
• Control board is faulty.
• 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.
• Remove electrode assembly
and clean the probes. If
problem is not corrected,
replace electrode assembly.
• Make connection to tank
secure.
• Replace control board.