Extension Pcb A4P - Daikin EDLQO5CAV3 Service Manual

ESIE15-08B | Part 2. Troubleshooting

4.11. Extension PCB A4P

Technical specification
-
Location
Wiring diagram
Check procedure
Electrical check
W : R
ARNING
• When reconnecting a connector to the PCB, do not apply force or damage the connector or the connector pins on
the PCB.
1. Switch off the Daikin Altherma Monobloc CA via the user interface.
2. Switch off the Daikin Altherma Monobloc CA with the field supplied circuit breaker.
3. Remove the hydrobox top plate assembly, refer to
4. Remove the hydrobox front plate, refer to
5. Remove the switch box cover.
6. LED:
If LED 5 is blinking = communication error between PCB A4P and PCB A1P:
- Check connectors on PCB.
- Check connection between PCB A4P (X10A) and A6P (X10A)
- Check connection between PCB A2P (X1A) and A1P (X10A)
- Check power supply to PCB A1P.
- If all above checks are OK, replace PCB A4P.
If LED 2 is not blinking:
- Replace PCB A4P.
Page 86
Daikin Altherma Monobloc CA
Switch box - Control Box
A4P
F2B
X4M
F
ISK OF IRE
"Removing the hydrobox top plate assembly" on page 110
"Removing the hydrobox front plate" on page
Description
The extension PCB A4P is used to control the unit
from the control box.
Unit
X1M
X8M
4. Component checklist - Water Circuit
Not applicable
111.
19/07/16