Navien NP-180, Руководство по обслуживанию

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4.6.5. Thermistor
Navien Part No.
Function
Failure Event
Measure cold, mixing, H/E, hot water temperature in the water heater.
Unable to properly measure water temperature within the water heater.
1. Unable to shut down the water heater if the water temperature from the
heat exchanger exceeds 197.6
ȕ (92 Ȕ ).
2. Unable to shut down the water heater if the flue gas temperature from the
exhaust duct exceeds 149
ȕ (65 Ȕ ).
E007, E008, E021, E022, E032, E033, E041, E042
1. Visual inspection: Connection and/or breakage of wires.
2. Voltage check: Check range of voltage shown below.
3. Resistance check of sensor
Effects
Error Code
Diagnostic
BH1403081A(Cold)
BH1403082A(Mixing)
BH1403083A(H/E)
BH1403084A(Hot)
Check Point B
Color /
Number of wires
1. Black – Black : DC 0 ~ 5 V
2. Blue – Blue : DC 0 ~ 5 V
3. Red – Red : DC 0 ~ 5 V
4. Yellow – Yellow : DC 0 ~ 5 V
5. Resistance-Open=infinite; Shorted=0 Nomal =4.121
๐ at 113 ȕ
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