6.3
Error codes
C
ontrol
S
tep
Order
Measures
1.
Check if flue gas leak from draft driverter? Yes:
↓
2.
No:
↓
3.
2.
Yes:
No:
No:
↓
3.
3.
Yes:
Check connection(especially on RAS 5; 20 way
Connector) If needed, replace cable harnecs
If A4 still flashing.
↓
4
4.
If A4 is still flashing.
↓
5
No:
Yes:
↓
5.
5.
A4
IS FLASHING
Flue gas
leak from flue hood
Turn off the appliance and open again
Wait
for appliance to restart automaticaly after 12 minutes
Check if temperature around flue
gas NTC is >70°C or not;
Go to service function AE
Flue gas NTC temperature
displayed on HT3
Measure CO and check if it is in limits
Check and correct flue gas pipes installation
Measure draft (must be > 0,015 mbar)
Chek and correct wind protection installation.
If A4 still flashing.
↓
3
Check if flue gas NTC is defective
or not as below;
Turn off the appliance
Pull NTC cables out
Check NTC resistance
Within specified limits within
Change the sensor(NTC)
Fasten the connection cable
Switch on the appliance
If A4 is flashing.
↓
4
Is draft diverter dirty or damaged?
Electronic card is out of order
Clean the draft diverter surface or replace
it if needed.
Switch off the appliance
Cut mains supply
Change the electronic card
Connect to mains supply
Switch on the appliance
|
31
Troubleshooting
6 720 660 238 (2008/07)
31
2
Summary of Contents for ZWC 18-3 MFK
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