AA
IS FLASHING
Plate heat exchange
r blocked
or DHW NTC is not
at its position
Control
S
tep
Order
Measure
1.
2.
3.
D5
D
7
IPMx
modules NTC is defective
The
gas valve cables not connected
1.
1.
IS FLASHING
IS FLASHING
Control
S
tep
Order
Order
Control
S
tep
Measures
Measures
Check if DHW NTC at its position or
not?
Check if plate heat exchanger (PHE)
blocked or not?
Electronic card is out of order
Check IPMx module NTC
Check cable connections to gas valve
Change flow NTC on IPMx module
Connect cables to gas valve
Yes:
Yes:
No:
No:
Install DHW NTC onits position
Restart appliance
Tap water for 3 minutes
If AA flashes again
Clean PHE or replace if needed
Restart appliance
Switch off the appliance
Cut mains supply
Change the electronic card
Connect to mains supplyu
Switch on the appliance
|
55
Troubleshooting
6 720 660 238 (2008/07)
55
2.
2.
3.
Summary of Contents for ZWC 18-3 MFK
Page 1: ......
Page 11: ...Fig 8 6 720 660 238 2008 07 11 11 Appliance Layout and Hydralic Diagrams 2 2 2 ZWE 24 5 MFK...
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