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3.3 DATA TRANSFER BETWEEN PCB’S
If a new PCB needs replacing, you can transfer data (gas type, model type, gas pressure and error history) from the
existing PCB to the new one by doing the following.
Item necessary
•
New PCB
•
Data transfer cable (included in the new PCB).
Procedure
1.
Check the current settings and note them on a piece of paper.
2.
Disconnect the electrical power.
3.
Remove front panel from water heater.
4.
Locate PCB in the lower right side of water heater
5.
Remove screw at top of PCB and remove original PCB from water
heater.
6.
Disconnect all wire harnesses from the original PCB.
7.
Set the original aside for future use.
8. Connect all wire harnesses to the new PCB.
Do not touch any other areas on the PCB board besides the “A” and “B” buttons as direct while
power is supplied to the appliance. Parts of the PCB are supplied with 230 V.
9. Connect Data Transfer Cable (provided) to the green connector at the top of both, the new PCB and the
original PCB, as illustrated. Connect the electrical power.
10.
Press the “B” button an the new PCB for 1 second.
11.
When “t” appears on the controller press “A” button an the new PCB for second.
12.
The controller will display the set temperature and then fl ash “PAS”
NOTE
: If controller display “bAd” or nothing within 10 seconds, disconnect power and data transfer cable and
repeat steps 8 and 12.
If data transfer is repeatedly unsuccessful proceed to the set parameter manually, after completing
step 16.
13.
Press the “B” button on the new PCB to exit data transfer.
14.
Disconnect electrical power.
15.
Disconnect the data transfer cable from the new PCB.
16.
Reconnect electrical power to the water heater.
17. Reinstall front panel.
CAUTION
A
B
Fig. 1
NEW PCB
on water heater
Data transfer
cable
OLD PCB
Fig. 2
