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2322
TABLE 1
Outdoor Temperature (°F) Resistance (
kΩ) ±10
-30 231.8
-20 163.4
-10 117.3
0 84.8
10 62.2
20 46.1
30 34.4
40 26.1
50 19.9
60 15.3
70 11.9
80 9.3
90 7.3
100 5.8
Figure M
Red “Call Dealer For Service” Light
Yellow “Change Water Panel” Light
Green “Humidifier On” Light
90-1227
SYMPTOM
Humidifier does not operate in “Test/Reset” mode.
TROUBLESHOOTING PROCEDURE
• Check wiring diagrams for correct Humidifier Control
installation
• Make sure that the blower is operating and the HVAC
system is calling for heat.
• Check wiring diagrams for correct Humidifier Control
installation.
• If connected to a Model 400 Series humidifier, make sure
both floats in the bottom of the scale control insert are in
the down position. If necessary, dump out water to lower
the floats.
• Check voltage at the Humidifier Control “R” and “C”
terminals. Voltage should be 22 VAC minimum to 30 VAC
maximum.
• Make sure that the saddle valve is open.
• In “Test/Reset mode, the humidifier will operate for 1
minute only. DO NOT LEAVE THE HUMIDIFIER CONTROL IN
“TEST/RESET” MODE AS THE HUMIDIFIER WILL NOT
OPERATE.