Panasonic wall split inverter problem

REQUIRE FAULT CODE DIAGNOSIS CS-CUE15HKR
CODE H11
UNIT IS ONLY ONE DAY OLD:rolleyes:

Comms error.
See if you have ~20-30v at the indoor unit between the neutral and the signal terminal after reseting the power.
If not, somethings wrong with the wiring or ourdoor unit.
If you have that voltage there, somthing is wrong with the indoor unit.

H11 is the first fault code that pops up when checking fault codes, are you sure it is H11? move up and down using the timer buttons to confirm.

If it is H11, than the indoor unit has not had a reply from the outdoor units for 60 seconds, communications are performed over interconnects 2 and 3.

Check your interconnect for poor connections or shorts

If all connections are good, than measure beteeen them on the DC range, and it should be fluctuating between 20 and 50 V DC

If it is, than it may be a faulty indoor PCB, if it is not, than disconnect number 3 at the outdoor unit, and measure what comes out of the PCB on 3, in reference to number 2,it should be about 20 - 70 Vdc
If this voltage is not there, than the outdoor PCB may be faulty

Good point.
When you get into test mode, the error isn't displayed on the controller, you use the time up and down buttons to scroll through the codes, watching for the code that makes the indoor unit beep multiple times (5?).
It starts the codes at H11, so go scrolling through the m all and back to H11 to confirm it's a H11 fault and not something else.