5. TROUBLESHOOTING
©2014 Kraus Global Ltd.
46
Retail CNG Dispenser Manual
Table 5.3: Troubleshooting
ISSUE
POSSIBLE CAUSE(S)
RECOMMENDED ACTION
• Dispenser allows CNG flow
into vehicle without
authorization
• Low-bank solenoid valve is
stuck open
• Rebuild low-bank solenoid
valve
—contact Tech. Support
for more information
• Dispenser authorizes and
price/volume display resets,
but no CNG flow present
• Manual shut-off valve(s) are
closed
• Turn manual shut-off valve(s)
to open position
• Filter inlet valve valve(s) are
closed
• Turn filter inlet valve(s) to open
position
• Hose nozzle is faulty
• Inspect the hose nozzle;
ensure it is in proper working
condition
• No gas supply from storage
• Inspect gas supply in storage
• Vehicle fill line valve is closed
• Inspect vehicle fill line valve
• Low-bank inlet valve is stuck
closed
• Rebuild low-bank solenoid
valve
— contact Tech. Support
for more information
• Low-bank coil is faulty
• Rebuild low-bank solenoid
valve
• Price/volume display does not
reset upon authorization
• Authorization-handle proximity
switch is faulty or disconnected
• Inspect the functionality of
component
—refer to
Table 5.4
for component voltage
statuses.
• Dispenser-POS wire
connections are disconnected
• Ensure the POS connections
are secure
• POS or card-lock system is not
allowing authorization,
disconnected, or not properly
configured
• Ensure POS or card-lock
system is connected and
properly configured
• POS pump-ID is not set
• Ensure pump-IDs are properly
configured see s
ection 3.4
of
the manual
• POS-ID is not configured
• Ensure POS-IDs are properly
configured
—see s
ection 3.4
of
the manual
•
