User Guide

12
6. Appliance Control Display
6.4 Error Mode
If a boiler fault occurs, the CHALLENGER enters a hard lockout
c
ondition which requires a manual reset by pressing the reset
button
. A hard lock is indicated by a flashing [E] on the operating
display as well as a flashing LED above the reset button. The error
c
ode is shown on the main display. The error must be corrected
before the control will reset.
The appliance freeze protection feature is disabled dur-
ing a Hard Lockout, however the CH circulator will oper-
ate.
CAUTION
During a hard lockout or low water condition the appli-
ance will not re-start without service. If the heating
system is left unattended in cold weather appropriate
safeguards or alarms should be installed to prevent
property damage.
CAUTION
Table 1: 12 kOhm NTC Sensor Resistance
Temperature (°F) Temperature (°C) NTC (kOhm)
-22 -30 171.70
-
4 -20 98.82
14 -10 58.82
32 0 36.10
50 10 22.79
68 20 14.77
78 25 12.00
86 30 9.81
104 40 6.65
122 50 4.61
140 60 3.25
158 70 2.34
176 80 1.71
194 90 1.27
212 100 0.95