American Hometec AHG-T42-LP, Инструкция по установке и эксплуатации

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Page 23
Code Indication
Remedy
E2
Flame detection error.
1.
The detection circuitry for ignition
and flame detection has come loose
or failed to connect.
2. Ignition sequence was unsuccessful.
3.
An accidental flameout occurred.
4.
The ignition and flame detection
circuitry malfunctioned or broke
down. Igniter is not activating.
5. Wrong gas type is used
1. Connect the relevant circuit properly
and eliminate the bad connection.
Replace any failed circuit elements.
2. Check fuel gas supply.
（
especially
when first installed as air pockets
might exist in the gas line. Retry the
ignition process several times).
3. Check if the fuel gas pressure is too
high or too low
4. Check if the water pressure is
normal.
Water pressure is too low causing
flow to drop below required
minimum flow.
Replace or repair igniter or flame
detection system.
5. Check the gas type, if the gas type
that the building is supplied with is
not the one indicated in rating plate
on unit, contact the dealer for the
proper unit to match the gas type
E3
Inlet water temperature sensor
problem.
Same possible causes described in
Section E1.
Same troubleshooting methods
described in E1.
E4
High temperature automatic shutdown .
For ten (10) seconds a water
temperature above 85
o
C was detected.
The controller has automatically closed
the electromagnetic valve and unit shut
down.
Normal safety precaution to protect
against a rare occurrence in which unit is
enabled and then the water flow is
dramatically reduced causing a small
slug of very hot water.