Navien NHB-055, Service Manual

Page: 101 / 147

NHB Service Manual 101 Version 1.0
5.2.9 060Error
Error occurrence conditions and check items
Error Description
E060
Dual Venturi error
This error message is displayed on the front panel if the wiring is disconnected or the Dual
Venturi malfunctions.
The boiler switches into Lock-Out, and performs post-purge continuously and operates the
pump.
Check items
1. Check that the Dual Venturi is operating correctly. Run the Dual Venturi Test Mode.
2. Check that the wiring harness is connected correctly and the cables are not damaged.
Is Dual venturi closed?
Is Dual venturi repeatedly
open and closed?
Replace the controller
Is Dual venturi
OFF?
Reset the Unit
Replace the
Dual venturi
Yes
Yes
No
No
Is Dual venturi open?
Is Dual venturi wire normal?
Is Dual venturi repeatedly
open and closed?
Replace the controller
Is Dual venturi
ON?
Reset the Unit
Check the
Dual venturi
wire
Replace the
Dual venturi
Yes
No
Yes
No
Yes
No
Dual venturi OFF Dual venturi ON