25
24
SYMPTOM
Humidifier does not operate in “Test/Reset” mode
TROUBLESHOOTING PROCEDURE
• 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.
• Check the Model 50 Current Sensing Relay (if used) for the
correct installation (see Model 50 instructions).
• Check Blower Activation Relay Model 4851 (if used) for
correct installation (see Model 4851 instructions).
• 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.
SYMPTOM
Yellow “Change Water Panel” Light is blinking (see
Figure R
)
TROUBLESHOOTING PROCEDURE
Check the condition of the Water Panel and replace it if
mineral deposits are blocking air flow. Follow the instructions
on the Water Panel box. Rotate the knob to the “Test/Reset”
position for at least 5 seconds to reset Water Panel change
timer. Check that the timer setting is correct for the humidifier
model and water conditions (see
Figure B
). DO NOT LEAVE
THE HUMIDIFIER CONTROL IN “TEST/RESET” MODE AS THE
HUMIDIFIER WILL NOT OPERATE.
