Navien CH-180 Service manual - page 108
Other manuals for CH-180:
Owner's Operation Manual, User's Operation Manual, Installation Manual, Operation Manual, Installation Manual
Manual is about: Combination Water Heater
/ Heating Boiler
of
155
106
Error occurrence conditions and check items
5.26. 39Error
Error
Description
As one more units are operating in the cascade system.The system displays 39E
(cleared manually) on the remote controller and the PCB, and switches into the
Lock-out mode.(gas valve and ignition transformer locked).
1. Check the supply of cold water. (Frozen / locked valve)
2. Defective flow sensor
3. Defective PCB.
39E
Flow
sensor
error
Check
items
Cancelation cascade
system and faucet open
Water flow out?
YES
NO
Check connector
Or Replace water flow sensor
Check supply cold water
YES
©Navien America Inc. 2010
CH series service Manual
Version 1.0