bobjob
25-02-2016, 07:37 AM
Hi everyone
I hope someone can help me out with this problem I have with an old Daikin VRV111 system.
The first visit to the site resulted in a replacement of the AP1 main board due to no output on F1-F2, no 15vDC going out of the unit.
The PCB was replaced and the system run up all OK with no problems, as this was about 6months ago in the Summer and I can remember that it was mainly running on cooling for the 2-3 days I was on site.
A service call last week to the unit shows that it is failing on faults U7 and sometimes on fault UA . On investigation there is no output from the replaced AP1 PCB, to the another board on the unit in the next module (AP2) on the comms line Q1-Q2.
It looks like that the replaced PCB as again failed, anyone have any ideas or had this problem before ?
Daikin are no real help and all the setting on the replaced PCB were all set correctly,
BTW this VRV may not have been working for some time as the building was unoccupied for a few months after the initial start up.
thanks Bob
I hope someone can help me out with this problem I have with an old Daikin VRV111 system.
The first visit to the site resulted in a replacement of the AP1 main board due to no output on F1-F2, no 15vDC going out of the unit.
The PCB was replaced and the system run up all OK with no problems, as this was about 6months ago in the Summer and I can remember that it was mainly running on cooling for the 2-3 days I was on site.
A service call last week to the unit shows that it is failing on faults U7 and sometimes on fault UA . On investigation there is no output from the replaced AP1 PCB, to the another board on the unit in the next module (AP2) on the comms line Q1-Q2.
It looks like that the replaced PCB as again failed, anyone have any ideas or had this problem before ?
Daikin are no real help and all the setting on the replaced PCB were all set correctly,
BTW this VRV may not have been working for some time as the building was unoccupied for a few months after the initial start up.
thanks Bob