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SYMPTOM
HumidifierControlTroubleshooting Guide
Appliesto both Automatic and Manual Operation unless indicatedotherwise.
TROUBLESHOOTING P ROCEDURE
"Change Humidifier Pad"
•
Call your installerto have your Humidifier Pad changed, or visit your installerto purchase a new Humidifier Pad.
Indicator is lit.
Followthe instructions on the Humidifier Pad box.
Humidifier operates only
in "Test" mode
• 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 higherthan 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 48,000ohms).
• 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 inchesfrom 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)
TABLE 1
Outdoor
Resistance
Temperature
k_
-30°F
230.6
-20°F
163.8
-10°F
117.6
0°F
85.4
10°F
62.6
20°F
46.3
30°F
34.6
40°F
26.1
50°F
19.9
60°F
15.3
70°F
11.9
80°F
9.4
90°F
7.4
100°F
5.9
Humidifier operates
•
If the humidity level in the home is less than the knob setting, the Humidifier Control will operate the Humidifier until
constantly
the humidity level is higher than the knob setting.
•
In the "Test" mode, verify unit will operate for approximately one minute.
•
Checkthe resistance of the Outdoor Temperature Sensor as instructedabove.
•
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, _erformthe following:
1. Check wiring diagram for correct Humidifier Control Installation.
2. Remove wires from Humidifier Control's "H" terminals. If Humidifier continues to operate, replace solenoid valve.
Humidifier or Humidifier
•
Checkfor steady 22 VAC- 30 VAC with voltmeter.
Control "chatters" or
•
Make sure Outdoor Temperature Sensor wiring is not run alongside wires carrying high voltage (120VAC or higher).
clicks ON and OFFrapidly
(Automatic Mode Only)
Red Diagnostic Light is on
•
(See FigureH)
.
Checkthat 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 44,000and 48,000ohms).
RED
DIAGNOSTIC
Form/Catalog:IM-AHC-03
Replaces I M-AHC-02
© 2012CAC/BDP
7310West Morris St.
Indianapolis, IN 46231
10009851 3.12
........................................................................................................................................
B2205740A
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