Bunn Axiom Series - Troublehsooting Refill, Heating & Brewing Systems

AXIOM
®
Training Manual
28
TroubleshootingtheRellCircuit
Will not refill 1. poWer off to breWer
Press OFF/ON switch on
control panel to determine if power is ON.
“ “ 2. Water shut off
Make sure water is ON.
“ “ 3. error Message
Brewer has shut down due to malfunction
(See Service Fault Messages in this manual)
“ “ 4.on/off sWitch (if equipped)
Make sure ON/OFF Switch is “ON” and indi-
cator is lit.
“ “ 5. liMe build up on probe(s)
Remove Level Probe and check for lime de-
posits on tip. Clean and reinstall.
“ “ 6. refill valve or control board
EnterServiceToolsandtesttheRellValve.
Astherellvalveactivates,checkthevoltage
across the coil wires. If voltage is present
(120V), refer to wiring diagram and check the
main wiring harness. If main wiring harness
checks ok, the Control Board might need
replacement.
refill does not shut off
poWer “on”
1. liMe build up on probe
Remove Level Probe and check for lime de-
posits on tip. Clean and reinstall.
“ “ 2. Water level sensing systeM
Replace control board
“ “ 3. refill valve or control board
EnterServiceToolsandtesttheRellValve.
Astherellvalveactivates,checkthevoltage
across the coil wires. If voltage is present
(120V), refer to wiring diagram and check the
main wiring harness. If main wiring harness
checks ok, the Control Board might need
replacement.
refill does not shut off
poWer “off”
1. refill valve
“ “
Troubleshooting the Heating Circuit
Water does not heat to proper
teMperature
IMPORTANT: Make sure no tem-
perature tests are taken before the
display reads ready. Tank tem-
perature must be stabilized before
readings are taken.
1. display’s error Mes-
sage
Brewer has shut down due to malfunction.
See Service Fault Messages section in this
manual.
“ “ 2. Water not touching
Main (short) level probe
Remove level probe and grommet. Look into
hole on tank lid. Water must be within approxi-
mately one inch from top of tank.
“ “ 3. Water level probe
sensing systeM
Checkrellcircuit.Heaterswillnotturnonif
water is not grounding level probe.
“ “ 4. teMperature probe
Check/replace
“ “ 5. liMit therMostat or
tco
Check/replace
“ “ 6. tank heater
Check/replace
spitting or excessive steaMing 1. liMe build up on teM-
perature probe, tank or
tank heater
Inspect probe and tank assembly for exces-
sive lime deposits. Delime as required.
“ “ 2. teMperature probe
Check/replace
probleM probable cause reMedy
probleM probable cause reMedy