08Error - Navien NP-180 Service Manual

5.6. 08Error

Error occurrence conditions and check items.
Error
08E Check the hot water temperature sensor.
Short-circuit
If a problem (short-circuit: 248
of hot water
the system displays the error message 08E on the remote controller and the PCB.
temperature
sensor
(Hot water output temperature sensor)
1. Check if the hot water temperature sensor connector is wet due to any reason,
including leakage.
Check items
2. Replace the defective hot water temperature sensor.
3. Replace the PCB.
Is the hot water thermistor
normal?
Yes
Check connector
©Navien America Inc. 2010
Description
or higher) is detected for 3 seconds,
No Replace hot water thermistor
Resistance between two red wires of CN 13 is from
0.8 to 20k ohm at normal condition.
Caution: B efore measuring resistance of the
thermistor, remove the connector from the PCB
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NR/NP series service Manual Version 2.0