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Navien NCB500-2S/37K User Manual

Navien NCB500-2S/37K
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Troubleshooting 75
5.2.8 Error 046
Is the heat exchanger’s
thermistor operating
correctly?
Is the resistance
within the normal range?
Replace heat exchanger
thermistor.
Check connections
Step 1: Flush, clean Filter
Step 2: Restart
Step 3: Replace PCB
Yes
Yes
No
No
5.2.9 Error 047
Error Conditions and Checklist
Is the exhaust thermistor
operating correctly?
Check connection
Replace exhaust thermistor
No
Yes

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Navien NCB500-2S/37K Specifications

General IconGeneral
BrandNavien
ModelNCB500-2S/37K
CategoryBoiler
LanguageEnglish

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