HDG M299, Operation Manual

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8 Troubleshooting – Procedure
156
HDG M299/300/350/400 - Version 1 - en
©
HDG Bavaria GmbH 07/2008
8 Troubleshooting
If a fault occurs in the heating system, the Acknowledge fault key
flashes and the fault is shown in the display. Faults can be fixed as
follows.
8.1 Procedure
1. Look for the displayed fault's cause and remedy in Table 8/1 -
Faults.
2. Fix the fault, or have it fixed.
✓
The Acknowledge fault key lights up.
3. Acknowledge the fault with the Acknowledge fault key.
4. For faults which affect safety , switch the main switch off and back
on again after waiting a few seconds.
✓
The fault message is no longer shown in the display.
✓
The fault is fixed.
8.2 Possible faults
Possible fault and warning messages are divided into three
categories:
ES
: Emergency stop. The boiler switches off.
FA
: Fault. The boiler switches to the "burn-out" phase and then
switches off.
WA
: Warning! The boiler continues to run.
No. Fault Cause Remedy
ES001 Emergency stop
• Emergency stop switch was
pressed
•
Emergency stop switch was
not connected properly or is
not connected
• Unlock emergency stop
switch and confirm with the
Acknowledge fault key
• Check the electrical
connection
ES017 Overpressure in
combustion
chamber
• Overpressure in combustion
chamber
•
Heat exchanger dirty
• Clean heat exchanger
Table 8/1 - Faults