Slant/Fin LYNX LX-85A Installation And Operating Instructions Manual page 40

National Excelsior Company
www.excelsiorhvac.com
40
ERROR CODE
30
31
32
51
52
C. WARNING ERRORS:
ed, and the warning is displayed intermittently. Operation of the DHW mode is automatically restored, once the
condition is fixed. The temperature display shows the error code. Pressing the "reset" button is not required.
04
Domestic Hot Water Tank Sensor Open
14
INDICATION
Excess Flue Temperature
Low Water Cutoff Error
Excess Water Inlet Temperature
Reset Button Error
Boiler Model Selection Error
Indicated by an "H" in the mode display. Operation of the space heating mode is not affect-
Domestic Hot Water Tank
Sensor Shorted
Subject to change without notice.
REMEDY
Check flue gas temperature, at the maximum firing
rate and high water temperature. If the flue gas
temperature reaches 212˚F, check the fuel input
rate and combustion. Check the condition of the
heat exchanger. If the flue gas temperature does
not reach 212˚F, replace the flue sensor.
If a low water cutoff is installed, check the system
water pressure and content. Check the condition of
the LWCO. If no LWCO is installed, check the
jumper is in place at the wiring terminal board.
See Figure 16a on page 20.
Check that the wire harnesses to the water inlet
and outlet sensors are not reversed. The water
inlet sensor harness should have a blue colored
connector, the water outlet sensor harness should
have a red colored connector. Check that the
pumping flow direction is correct.
Try turning power supply off and on again. If error
returns, replace the display board.
Check that the proper boiler model selection and
confirmation code is entered in the display.
See Table 5 on page 33.
If sensor is utilized, check wire harness connections
going to the sensor, or replace the sensor. If no sen-
sor is utilized, check the proper DHW mode is pro-
grammed. See Table 5 on page 33.
If sensor is utilized, replace the sensor. If no sensor
is utilized, check the proper DHW mode is pro-
grammed. See Table 5 on page 33.