FAULT CODE HISTORY

Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4

Observation:

This appliance stores the last 5 faults that it has detected.
To view them:
1. Gain access to the PCB, on the back of the PCB housing there should be a plastic screwdriver. If plastic screw driver is missing, use a safe alternative.

2. Restore the electrical supply to the boiler.

WARNING! - Mains voltage is expected during test
follow TOPs P4 live testing procedure

Mains Power On

3. Allow 15 seconds to elapse before proceeding.

4. Press the small red button on the display PCB once using the plastic screwdriver (see picture), replace screw driver for next time required / person.

5. Display will now flash the last 5 faults, starting with the most recent.
CLICK HERE TO GO TO FAULT CODE DIAGNOSTICS

vk unica i32 j26301 pcb display and cn8.jpg

Information:
Using fault code history can help diagnose intermittent faults.
You may also wish to question the customer:

Does the fault code appear at a certain time during the day?

How long does the boiler operate until the fault code appears?

Does it appear during a DHW or CH demand?

Is the same fault code appearing on a regular basis?
The above are only example questions, any information the customer can provide can help find the cause of the fault.
Although XSol will diagnose a faulty component, if no fault code is present during testing then use engineer judgement to decide whether this component requires replacement or servicing.