Honeywell HM509 Owners Guide - Page 21

TrueSTEAM Humidification System Troubleshooting TrueSTEAM has internal system diagnostics that monitor system operation, maintenance schedules, and faults. If a system fault is detected, the system will attempt to recover itself up to five times in a 24 hour period. If unable to recover in that time, the red Call Service LED light will activate. If the TrueSTEAM Call Service light is red, a system fault has occurred from which the humidifier can not recover by itself. The table below shows the possible faults, along with steps to fix TrueSTEAM. If the red Call Service LED light is on, press/release the RESET button. The red Call Service LED light will begin blinking in a series that indicates what fault occurred. Refer to the table below for the fault signified by the number of blinks that occur. To clear the fault, press and hold the RESET button for 5 seconds. Press/hold the EMPTY button to clear the Service Timer light (i.e. the Press Empty button). Press/release the EMPTY button to drain the tank. No. of Red Light Blinks 1 2 A Fault Description AutoRecoverable? Steps to Fix To be Performed by Professional HVAC Technician Only Water/Heater temper- Yes, system will • Unplug TrueSTEAM and remove cover. ature sensor failed. return to "Ready" • Check water sensor connection to electronic board. if fault no longer • Reattach cover and plug TrueSTEAM in. exists in 1 hour. • If fault reappears, follow the cleaning steps on pages 23-24. • Reassemble tank and press the RESET button. • If fault returns, replace with applicable wattage heating element. Water sensors failed. Yes, system will • Unplug TrueSTEAM and remove cover. return to "Ready" • Disconnect water level sensor wiring, remove screen and B if fault no longer lift snap-hinge clamp. exists in 1 hour. Remove water sensor assembly. Will attempt to • Clean water sensor probes using warm soapy water so that reset itself 5 times the metal is exposed. in 24 hours. • Reassemble the sensor assembly in the unit, reattach and secure cover. • Plug unit back in and press the RESET button. • If fault reappears, replace sensor assembly. M24901 3 Failure to fill tank Yes, system will • Ensure inlet water is on. with water. return to "Ready" • Check for leaks around the tank seal and solenoid. if fault no longer • Turn off water supply and replace in-line water filter. exists in 1 hour. • Press/hold RESET button until the red Call Service light turns off. • If tank still fails to fill, press the EMPTY button (if unit fails to drain, unplug unit and make sure water in tank is cool). • Follow tank cleaning instructions on page 21. Ensure you have a firm grip of the tank prior to releasing the tank, especially if water is present. • Clear any excess debris from the tank's bottom orifice to the solenoid. • Reassemble tank and plug unit back in. Press the RESET button. • If water still fails to flush into the tank, replace the solenoid valve. 19 69-2036EFS-07