Navien CH-180 Service manual - page 101
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
99
Check method
Error type
Cause
Check method
Remark
Check connector assembly and contact of the air
pressure sensor.
1. Black + White
Operating voltage: 5V
2. Black + Red
Sensor output
Open: 0.1±0.1V or lower
Short-circuit: 4.5±0.2V or higher
An error occurs if the air pressure sensor voltage of
1.20V is detected before prepurge.
If the trouble continues despite the checking of above
items, replace the PCB.
Abnormal
sensor
Other
trouble
Disconnector
Abnormal
air pressure
sensor
Defective
PCB
©Navien America Inc. 2010
CH series service Manual
Version 1.0