Troubleshooting - Bunn NITRON2 NGM Installation & Operating Manual

A troubleshooting guide is provided to suggest probable causes and remedies for the most likely problems encountered.
If the problem remains after exhausting the troubleshooting steps, contact the Bunn-O-Matic Technical Service Department.
• Inspection, testing, and repair of electrical equipment should be performed only by qualified service personnel.
• All electronic components have 120-240 volt ac and low voltage dc potential on their terminals. Shorting of terminals
or the application of external voltages may result in board failure.
• Intermittent operation of electronic circuit boards is unlikely. Board failure will normally be permanent. If an intermittent
condition is encountered, the cause will likely be a switch contact or a loose connection at a terminal or crimp.
• Solenoid removal requires interrupting the water supply to the valve. Damage may result if solenoids are energized for
more than ten minutes without a supply of water.
• The use of two wrenches is recommended whenever plumbing fittings are tightened or loosened. This will help to avoid
twists and kinks in the tubing.
• Make certain that all plumbing connections are sealed and electrical connections tight and isolated.
WARNING – • Exercise extreme caution when servicing electrical equipment.
• Unplug the dispenser when servicing, except when electrical tests are specified.
• Follow recommended service procedures.
• Replace all protective shields or safety notices.
PROBLEM
No collar/foam created during a
Nitro Coffee Brew dispense.
Weak or inconsistent collar/foam
on the Nitro Coffee Brew.

TROUBLESHOOTING

PROBABLE CAUSE
1. No power to Nitron Gas Module.
2. Thermal overload tripped in Nitron
Gas Module.
3. Nitron Gas Module start capacitor.
1. Leak in gas line or continuous
Nitron Gas Module operation.
2. Nitron Gas Module prefilter dirty.
3. Nitron Gas Module desiccant filter
absorption capability depleted.
4. nitron Cold Draft Dispenser:
2
a) Cleanliness of nitro dispense
nozzle.
b) Stout insert missing in nitro
nozzle.
9
REMEDY
Check outlet for power and within
acceptable voltage range.
a) Wait for thermal overload to cool
down and reset.
b) Relocate or correct environ-
ment conditions around Nitron Gas
Module.
Replace start capacitor.
Rating: 250VAC, 50/60Hz
7.0µF (-5/+10%)
Inspect pressurized line (tubing)
between the Nitron Gas Module and
Nitron dispenser for a leak. Inspect
the Nitron dispenser internal tubing
for a leak.
Replace prefilter.
Replace desiccant filter.
a) Clean Nitro Coffee dispense
nozzle assembly.
b) Install new Stout Insert into the
Nitro Coffee dispense nozzle.