Honeywell TrueSTEAM HM506 Installation Manual page 34

No. of Fault Description Auto-Recoverable? Steps to Fix
Service LED (Performed Only By Professional HVAC Technician)
Blinks
10 The heater relay No 1. Press and hold the Go button to clear the fault.
failed to turn on. 2. Initiate a humidity call.
3. If the fault returns, replace TrueSTEAM.
12 Temperature of the Yes, system will 1. Make sure ventilation holes in the cover are clear of
electronic circuit return to "Ready" obstruction. Make sure 1 foot of clearance is maintained
board is too high. if fault no longer around the cover's vent holes.
exists in one hour. 2. Ensure TrueSTEAM is installed in a location with conditioned
air 34°F to 104°F (1.1°C to 40°C).
3. Turn humidistat off and allow time for electronic board to cool.
This could take up to 2 hours.
4. Turn humidistat on and press the Go button to reset.
5. Confirm humidity call starts by checking if Humidifying light
is on.
6. Allow TrueSTEAM to run. Check for steam leaks around tank
and ventilation holes.
7. If the fault returns, replace TrueSTEAM.
13 Tank failed to drain. No _, CAUTION: Water in tank may be hot (>140°F [60°0]).
1. Press the Drain button.
2. If tank fails to drain, wait for water in tank to cool. Ensure tank
water is cool before proceeding.
3. Once cool, follow the tank cleaning steps. See "Manual
Cleaning Cycle" on page 24.
4. Reassemble tank and press the Go button to reset.
5. If the fault persists, replace solenoid valve (#50027997-001).
14 Heater failed to Yes, system will 1. Follow the tank cleaning steps. See "Manual Cleaning Cycle"
boil water, return to "Ready" on page 24.
if fault no longer 2. Reassemble tank and press the Go button to reset.
exists in one hour. 3. If the fault returns, replace TrueSTEAM.
15 No airflow sensed
in supply duct.
Yes, system will
return to "Ready"
if fault no longer
exists in one hour.
1. Ensure optional add-on air proving device is installed and
wired correctly. See "Make Add-On Air Proving Decision" on
page 18 for proper wiring.
2. Unplug TrueSTEAM, and remove cover.
3. Ensure DIP switches are set correctly. (DIP 4 down, DIP 5 up.)
4. Reconnect cover and plug in TrueSTEAM.
5. Press and hold the Go button to clear the fault.
6. If the fault persists, replace the air proving device being used.
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TrueSTEAMHumidification System 69-2285EF--01