Install Instructions

Humidifier Control Troubleshooting Guide
Applies to both Automatic and Manual Operation unless indicated otherwise.
Humidifier operates
constantly
Humidifier or Humidifier
Control “chatters” or
clicks ON and OFF rapidly
Red Diagnostic Light is on
• If the humidity level in the home is less than the knob setting, the Humidifier Control will operate the Humidifier until the
humidity level is higher than the knob setting.
• In the “Test” mode, verify unit will operate for approximately one minute.
• Check the resistance of the Outdoor Temperature Sensor as instructed above.
• Make sure the Outdoor Temperature Sensor is mounted completely outside the house on the North, East, or West side of
the house and out of direct sunlight. (Automatic Mode Only).
• Rotate the Humidifier Control knob counterclockwise to the “Off” position, and observe whether the humidifier turns off. If
the humidifier still operates in the “Off” position, perform the following:
1. Check summary wiring diagram for correct Humidifier Control Installation.
2. Remove wires from Humidifier Control’s “H” terminals. If Humidifier continues to operate, replace solenoid valve.
• Check for steady 22 VAC – 30 VAC with voltmeter.
• Make sure Outdoor Temperature Sensor wiring is not run alongside wires carrying high voltage (120 VAC or higher).
(Automatic Only)
• Check that the wiring is correct.
• Measure the resistance of the Outdoor Temperature Sensor by
removing the leads from the terminal and measuring the
resistance across the wires with an ohmmeter. Confirm the
reading with the temperature in Table 1. (For Manual Operation,
verify that the resistance across the leads of the Manual Mode
Resistor Case is between 44,000 and 48,000 ohms).
P.O. BOX 1467 • MADISON,WI 53701-1467
Call 608/257-8801 • FAX [phone]
10005402 05.05
B2202617B
Red Diagnostic Light
Figure L
Humidifier operates only in
“Test” mode
TABLE 1
Resistance
kΩ
-30˚F
-20˚F
-10˚F
0˚F
10˚F
20˚F
30˚F
40˚F
50˚F
60˚F
70˚F
80˚F
90˚F
100˚F
230.6
163.8
117.6
85.4
62.6
46.3
34.6
26.1
19.9
15.3
11.9
9.4
7.4
5.9
Outdoor
Temperature
• If outdoor temperature is greater than 60°F or less than -30°F, the Humidifier Control will only
operate in the “Test” mode. (For One Minute)
• If the humidity level in the home is higher than the knob setting, the Humidifier Control will
not operate the Humidifier.
• Check the resistance of the sensor by removing the leads of the Outdoor Temperature
Sensor from the terminals and measuring the resistance across the wires with an ohmmeter.
Compare reading to outdoor temperature in Table 1. (For Manual Operation, verify that
resistance across the leads of Manual Mode Resistor Case is between 44,000 and
48,000 ohms).
• Make sure the Outdoor Temperature Sensor is mounted completely outside the house on the
North, East, or West side of the house and out of direct sunlight. (Automatic Mode Only)
• If Outdoor Temperature Sensor is mounted in fresh air intake duct, make sure the probe
is no more than 36 inches from the outside wall. (Automatic Mode Only)
• Make sure the Outdoor Temperature Sensor is located at least 3 feet away from all exhaust
vents. (Automatic Mode Only)
SYMPTOM TROUBLESHOOTING PROCEDURE
HUMIDIFIER
CONTROL
TEMPLATE