Dual Venturi - Navien NCB-150E Service Manual

4.9.18 Dual Venturi

Part
Function
Failure Event
Effects
Error Code
Diagnostic
To conrol the amount of mixed gas supplied with TDR of 10:1.
It uses synchronous motor to control the amount of mixed gas by stage 1 and 2.
1. Blade not closing
2. Blade not opening
1. Frequent On/Off due to excessive heat
2. Fail to reach the set temperature due to lack of heat
E060
Voltage check: Checking the voltage of synchronous motor
(Approximately after 2 sec of Open/Close operation, the motor turns off.)
Check Point
System Details 81