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d4
IS FLASHING
A fast temperature increase detected inCH. (> 40 K / secs)
Order
Control Step
1.
Check system pressure on
manometer.
Is the system pressure > 0,5 bar?
2.
Is there air in the system?
Check if there is enough conducting
3.
paste between CH NTC
and pipe (for ZWE-5 types)
4.
Pull out connections of CH NTC
Measure the resistance ans see if it is
within specified limits.
Check if water is circulated.
5.
Electronic card is out of order.
6.
6 720 660 238 (2008/07)
Measure
Yes:
↓ 2.
No:
Fill the system with water.
If d4 still flashing? ↓ 2.
Yes:
↓ 3.
No:
Remove the air in system.
If d4 still flashing? ↓ 3.
Yes:
↓ 4.
No:
Add conducting paste between CH NTC and pipe.
If d4 still flashing? ↓ 4.
Yes:
Check cable connections (especially on RAS 5;20
way connector) If needed replace cable harness
If d4 still flashing? ↓ 5.
Change CH NTC
No:
If d4 still flashing? ↓ 5.
Yes:
↓ 6.
No:
Check and clean pump, filters and return and
flow valves
If d4 still flashing? ↓ 6.
Turn of the appliance.
Switch off the appliance
Cut mains supply
Change the electronic card
Connect to mains supply
Switch on the appliance
Troubleshooting
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Do you have a question about the ZWE 24-5 MFA and is the answer not in the manual?
Questions and answers
מה צריך לעשות כשהמכשיר מראה c4
When the Junkers ZWE 24-5 MFA shows error code C4, follow these steps:
1. Check APS hoses: Ensure they are not damaged, blocked, or have condensation.
- If damaged or blocked, turn off the appliance, clean and dry the hoses, then switch it back on.
- If C4 is still flashing, proceed to step 2.
2. Check 20-poled connection cable: Inspect for damage.
- If damaged, change the cable harness and switch on the appliance.
- If C4 is still flashing, proceed to step 3.
3. Check APS functionality: Verify if it is working.
- If APS is not working, further investigation or replacement may be needed.
Following these steps should help diagnose and resolve the C4 error.
This answer is automatically generated