Honeywell TrueSTEAM Professional Installation Manual page 21

no. of fault description
red
light
Blinks
4 Heating element
overheated.
5 Input voltage insuf-
ficient.
6 Water overflow
sensed.
M24901
7 HVAC power not
present (monitor this
fault only when DIP 4
and 5 are OFF).
8–9 The weld monitor
input is active when
the heater relay is off.
10–11 The heater relay failed
to turn on.
auto- steps to fix
recoverable? performed only by professional hVac technician
No • Follow tank cleaning steps (pages 15–17).
• Reassemble tank and press the GO button.
• If fault returns, replace TrueSTEAM.
Yes, system will • Verify the power circuit is not overloaded.
return to "Ready" • Unplug and replug the unit in to see if the fault returns.
if fault no longer • If fault returns, unplug unit and remove cover.
exists in 1 hour. • Ensure wiring connections are secure and attached.
• If fault returns, replace the TrueSTEAM with a new one (field
service is not recommended in the event line voltage is lost).
Yes, system will • Ensure drain hose is not kinked or submerged in water at the
return to "Ready" drain. Check functionality of condensate pump if used.
if fault no longer • Check for water coming out of drain/overflow line. If
exists in 1 hour. continuous water flow is present, follow the cleaning steps
on pages 15–17.
• Press and hold DRAIN button to drain tank.
• Set humidistat RH setpoint to Test mode.
• If fault returns, unplug TrueSTEAM.
• Loosen cover screw and remove cover.
•
lift snap-hinge clamp.
• Replace water sensor (#50027998-001).
• Reassemble the sensor assembly in the unit, replace snap-
hinge, and reattach and secure cover.
• Plug unit in, and press GO button.
Yes, system will • Unplug and replug the unit in to see if power returns.
return to "Ready" • If not, ensure HVAC equipment has power. Check circuit
if fault no longer breaker and replace fuse if circuit is tripped.
exists in 1 hour. • Unplug TrueSTEAM and remove cover.
• Check DIP 4 position and verify correct wiring based on DIP
4 position. See Power Monitoring for more information.
• Plug unit in.
• If fault reappears, ensure the circuit being used has the
rating to support the unit. Unplug any additional equipment
plugged into this circuit. If fault disappears, the circuit
capacity is not properly sized to your unit.
• If fault returns, replace unit.
No • Press/hold GO to clear service fault.
• Initiate a humidity call.
• If fault returns, replace TrueSTEAM.
No • Press/hold GO to clear service fault.
• Initiate a humidity call.
• If fault returns, replace TrueSTEAM.
19
TrueSTEAM Humidification System
trouBleshootInG
Disconnect water level sensor wiring, remove screen and
Remove water sensor assembly.
69-2285EFS—03