Toyotomi Toyoset NS-2800, Service Manual, Page: 28 / 47

28
6-4. Troubleshooting Guide IV
Extinguished and Always extinguishes Yes Burner thermistor mal-
vent lamp and flame in 22 minutes after function or disconnected
lamp flash. Ignition. wiring (Note 1)
In case of occasional
No extinguishments, flue pipe or
flue pipe top is in wrong
position. (Note 2)
Note 1: The resistance of the burner thermistor after 22 minutes from ignition must be
lower than 30K Ω .
20°C (68°F) 250°C (482°F) 300°C (572°F) B Constant
Approx. 20M Ω 70K Ω 31.5K Ω 5100
Note 2: The heater should be able to operate even with an extremely short or excess
supply of fuel, while it may occasionally operate when the combustion air is
contaminated with emission gas. Make sure that the flue pipe and the obstacle
cover are free of any interfering substances for proper ventilation.
In case of extension of flue pipe and/or installation of flue pipe top on the wall or
on the inclined wall, install the exhaust guide ring which is provided in the
extension pipe set in order to prevent from contaminating with emission gas as
illustrated in the following figure.