carrola7
02-05-2014, 09:45 PM
Having a very strange issue with a City Multi at the moment.
A bit of history first.
There was a building with a number of outdoor units (7 I think) all connected to a G50 and procon BMS modbus. They decided to build a wall down the middle of the office and split the City Multi systems between the two sides.
My job was to take three of the outdoor units off the existing system, install an AG-150 and recommission.
I disconnected the central controller connections at the three outdoor units and ran a new cable, daisy chaining the three units and connecting to my new AG-150. When I commissioned the system all seemed to be working well.
Fast forward a couple of months and new tenants move into the office. I get a call to say that two of the controllers are turning off of their own accord and one of the controllers has 'CENTALLY CONTROLLED' flashing on the screen and does not allow any of the buttons to be used.
The system set-up is as follows:
Outdoor type: PURY-P250YMF-C
Remote type: PAR-F27MEA
Outdoor unit: 051
-IC01, RC101 (Group 1 on AG-150)
-IC02, IC04, IC05, RC102 (Group 2 on AG-150)
-IC03, RC103 (Group 3 on AG-150)
Outdoor unit: 056
-IC06, IC07, IC08, IC09, IC10, RC106 (Group 4 on AG-150)
-IC11, RC111 (Group 5 on AG-150)
Outdoor unit: 062
-IC12, IC13, IC14, RC112 (Group 6 on AG-150)
I went to investigate the issues in the office and found various fault codes appearing:
1501- OC51
1501- OC62
6603- IC11
Now the two 1501 fault codes seemed to appear almost at the same time.
My first thought was that there is something wrong with either the central controller or one of the outdoor boards and the central controller is migrating the issues to the other units.
I went back to the three outdoor units and disconnected CN52 (central controller) at the outdoor board. I carried out a virgin restart on each outdoor unit and set them up as individual standalone systems, the theory being I could see where the problem was originating from.
That day the only problem with any of the systems was that RC106 turned itself off. I left them alone for another day (today) to see what, if anything, would happen. All three systems ran without any issues up to about 14:00, when it was noticed that RC102, RC106 and RC112 all had centrally controlled on the screen and did not allow any of the buttons to be used. Holding 'FILTER + ON/OFF' cleared the 'CENTRALLY CONTROLLED' from RC112 but the other two were locked in their current modes.
I cannot understand what is linking still linking these three systems together. I thought the only way systems could be linked together was through a central controller.
Have I forgotten something or am I ignorant about some other way the MNET can be linked between the three systems?
Any suggestions at all are very welcome. I'm completely out of ideas here.
A bit of history first.
There was a building with a number of outdoor units (7 I think) all connected to a G50 and procon BMS modbus. They decided to build a wall down the middle of the office and split the City Multi systems between the two sides.
My job was to take three of the outdoor units off the existing system, install an AG-150 and recommission.
I disconnected the central controller connections at the three outdoor units and ran a new cable, daisy chaining the three units and connecting to my new AG-150. When I commissioned the system all seemed to be working well.
Fast forward a couple of months and new tenants move into the office. I get a call to say that two of the controllers are turning off of their own accord and one of the controllers has 'CENTALLY CONTROLLED' flashing on the screen and does not allow any of the buttons to be used.
The system set-up is as follows:
Outdoor type: PURY-P250YMF-C
Remote type: PAR-F27MEA
Outdoor unit: 051
-IC01, RC101 (Group 1 on AG-150)
-IC02, IC04, IC05, RC102 (Group 2 on AG-150)
-IC03, RC103 (Group 3 on AG-150)
Outdoor unit: 056
-IC06, IC07, IC08, IC09, IC10, RC106 (Group 4 on AG-150)
-IC11, RC111 (Group 5 on AG-150)
Outdoor unit: 062
-IC12, IC13, IC14, RC112 (Group 6 on AG-150)
I went to investigate the issues in the office and found various fault codes appearing:
1501- OC51
1501- OC62
6603- IC11
Now the two 1501 fault codes seemed to appear almost at the same time.
My first thought was that there is something wrong with either the central controller or one of the outdoor boards and the central controller is migrating the issues to the other units.
I went back to the three outdoor units and disconnected CN52 (central controller) at the outdoor board. I carried out a virgin restart on each outdoor unit and set them up as individual standalone systems, the theory being I could see where the problem was originating from.
That day the only problem with any of the systems was that RC106 turned itself off. I left them alone for another day (today) to see what, if anything, would happen. All three systems ran without any issues up to about 14:00, when it was noticed that RC102, RC106 and RC112 all had centrally controlled on the screen and did not allow any of the buttons to be used. Holding 'FILTER + ON/OFF' cleared the 'CENTRALLY CONTROLLED' from RC112 but the other two were locked in their current modes.
I cannot understand what is linking still linking these three systems together. I thought the only way systems could be linked together was through a central controller.
Have I forgotten something or am I ignorant about some other way the MNET can be linked between the three systems?
Any suggestions at all are very welcome. I'm completely out of ideas here.