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Error conditions and Symptoms Analysis
5.11. 10Error
Error Description
The system senses the air volume and the RPM signal, and displays 10E on the
indoor thermo-stat in the following cases:
1. During prepurge
If the air volume sensor voltage fails to reach the standard voltage (ignition
voltage), while the FAN RPM signal is sensed, the system retries pre-purge. If
the air volume sensor voltage fails to reach the standard voltage after 5 pre
purge processes, the system determines the wind pressure error (or the wind
pressure hose error), and the boiler switches into Lock-Out.
2. During combustion of boiler
If the current RPM is higher than the standard RPM by 1,000 or higher, the
system deter-mines the wind pressure error (excessive wind pressure), and
stops the combustion process. The boiler switches into Safety-Shutdown, and
runs the fan continuously. If the current RPM becomes within the standard RPM
±500, the system cancels the error, and returns to the standby mode.
1. Check the air pressure hose (visual inspection on tear and hole, and water
remained in the hose after installation).
2. Check if the venture (burner) hole is clogged.
3. Check if the condensed water hose or the drain is clogged.
4. Check the flue and exhaust environment. (Inflow of exhaust gas generates
noise.)
5. Check if the air supply/exhaust flue is clogged (rainwater collected due to dent or
downward installation).
6. Check the flue environment (inflow of exhaust gas).
7. Defective air pressure sensor or PCB.
10E
Air presure
Sensor
error
Check
items
© Navien Ameri c a I n c . 20 1 0 CH series servi c e Manua l Version 1 .0