Honeywell HM509 Parts Guide - Page 1

Troubleshooting No. of Fault Steps to Fix Red Description To be Performed by Professional Light HVAC Technician Only Blinks 3 Failure to • Ensure inlet water is on. fill tank with • Check for leaks around the tank water. seal and solenoid valve. • Turn off water supply and replace in-line water filter. • Press/hold RESET button until the red Call Service light turns off. • If tank still fails to fill, press and hold the EMPTY button for 3 seconds (if unit fails to drain, unplug unit and make sure water in tank is cool). • Follow tank cleaning instructions in the Professional Installation Guide. 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 valve. • Reassemble tank and plug unit back in. Press the RESET button. • If water still fails to flush into the tank, replace the solenoid valve. 4 Heating • Press and hold the EMPTY element button for 3 seconds. overheated. • Follow tank cleaning steps in the Professional Installation Guide. • Reassemble tank and press the RESET button. • If fault returns, replace with applicable unit. 5 Input voltage • Problem most likely due to insufficient. voltage variation from service provider, or faulty wiring in the home. If problem is due to TrueSTEAM service alone, the fault should correct itself when voltage levels return to normal. • Press and hold the RESET button until CALL SERVICE light shuts off. • Initiate a humidistat call for humidity and monitor for fault light to return. • If fault returns, check the line cord input voltage before and during humidistat call. Line voltage should not drop below 102Vrms to ensure TrueSTEAM operates properly. 6 Troubleshooting No. of Fault Steps to Fix Red Description To be Performed by Professional Light HVAC Technician Only Blinks 6 Water • Ensure drain hose is not kinked overflow sensed. or submerged in water at the drain. Check functionality of condensate pump if used. • Check for water coming out of drain/overflow line. If continuous water flow is present, follow the cleaning steps in the Professional Installation Guide (69-2036). • After cleaning, set humidistat on and monitor operation. • If fault returns, unplug TrueSTEAM. • Loosen cover screw and remove cover. • Disconnect water level sensor wiring and lift snap-hinge clamp to remove water sensor assembly. See image on page 5. • Clean probes using warm soapy water so that the metal is exposed. It is OK to use steel wool or brush. • Reassemble the sensor assembly in the unit, reattach and secure cover. • Plug unit in, and press RESET button. • If fault reappears, replace water sensor assembly and/or solenoid valve. 7 HVAC power • Turn humidistat off. not present. • At thermostat, validate that the FAN setting turns the blower on. If not, check the circuit breaker. If circuit is tripped, reset or replace fuse. • If fault persists, unplug TrueSTEAM and remove cover. • Validate proper TrueSTEAM wiring to R and C terminals, using installation guide (69-2036). • Ensure proper connection quality of the wires. • Inspect R and C wires at the HVAC equipment board, ensuring no breaks and good connection if wire nuts are used. • Hook AC volt meter across R and C to validate 20-30VAC is present. To measure, it may be necessary to close furnace interlock switch. • Secure TrueSTEAM cover and plug unit in. Press the RESET button. • If fault persists, recheck wiring or replace unit. Note: If using VisionPRO IAQ to control TrueSTEAM, it is not necessary to monitor HVAC power. DIP 4 may be turned on to disable monitor. 7 Troubleshooting No. of Fault Steps to Fix Red Description To be Performed by Professional Light HVAC Technician Only Blinks 8-11 12 13 14 The backup • Replace the TrueSTEAM unit. weld monitor input is active when the backup heater relay is off. Temperature • Ensure ventilation holes in the of the electronic circuit board is too high. cover are clear of obstruction, and that 1 foot of clearance is maintained around the cover's ventilation holes. • Ensure the TrueSTEAM is installed in a location with conditioned air 32°F (0°C) to 104°F (40°C). • Turn humidistat off and allow time for electronic board to cool. Unplugging unit and removing cover will facilitate this. • Turn humidistat on and press RESET button. • Confirm humidity call starts (HUMIDIFYING light turns on). • Allow unit to run and check for steam leaks around tank and ventilation holes. • If steam is present, replace TrueSTEAM. Tank failed to drain. • Water in tank may be hot (>140ºF [60ºC]) and can cause burns. • Press and hold the EMPTY button for 3 seconds. • If unit fails to drain, turn humidistat to OFF, or unplug the humidifier and wait for water in tank to cool. Ensure tank water is cool before proceeding. • Once cool, follow tank cleaning steps in the Professional Installation Guide (69-2036EFS). • Reassemble tank and press the RESET button. • If fault persists, replace the solenoid valve. Heater failed • Press and hold EMPTY button to boil water. for 3 seconds, and follow tank cleaning steps in the Professional Installation Guide. • Reassemble tank and press the RESET button. • Initiate humidistat call. • If fault returns, replace the unit. 8 Troubleshooting No. of Fault Steps to Fix Red Description To be Performed by Professional Light HVAC Technician Only Blinks 15 No Airflow. • Unplug TrueSTEAM and remove cover • Validate proper wiring to terminals R and C, using the diagrams in the installation guide (69-2036). • Ensure proper connection quality of the wires. • Inspect R and C wires at the HVAC equipment board, ensuring no breaks and good connection if wire nuts are used. • Hook AC volt meter across airflow switch normally-open (N.O.) terminal and R. • Set thermostat FAN to off and reduce system setpoint. • Validate 0 VAC reading on AC Volt Meter • Set thermostat FAN to on. • Once blower starts, validate 20- 30VAC reading on AC volt meter. • If voltage is not present, check wiring and switch functionality. Differential pressure switch may require a new install location (away from duct bends, etc), or it may need to be replaced. • If voltage is present, continue to troubleshoot to validate proper airflow monitoring. • Keep AC volt meter across airflow switch N.O. terminal and R from HVAC unit. • Turn humidistat off. • Ensure DIP 4 and 5 are in off (down) position. • Secure TrueSTEAM cover and plug in unit. Press the RESET button. • Set thermostat FAN to off and reduce system set point. • Set humidistat call and monitor device. (may take 15-20 minutes) • When sound of blower clears, validate within 2 minutes that the AC volt meter reads 20-30VAC. • If time for switch to change state takes longer than 2 minutes, try a new install location for the switch, where state change is faster. TrueSTEAM HM512, HM509, and HM506 Troubleshooting and parts replacement guide 9 69-2144-03