theodore
28-05-2008, 10:24 PM
I'M HAVING A PROBLEM WITH A DAIKIN SUPER MULTI RMX140JZVMB R407C YEAR 2003.
THERE WAS A PCB BURNOUT AT FIVE OUTDOOR UNITS (OUT OF 100 SAME UNITS INSTALLED AT THE SITE).
THE FAULT CODE WAS U2.
WE CHANGED THE FAULTY PCBs.
FOUR OF THE UNITS ARE WORKING PROPERLY.
BUT AT ONE OF THEM THE SAME PROBLEM OCCURED.
[U2 FAULT & PCB BURNOUT].
The Unit Did Not Run At All After The Pcb Replacement Because Of The "u2" Fault. All Connections Were Double Checked.
I Mean That The Unit Did Not Run A Few Days Before The New Burnout. It Happened When We Tried To Start The Unit With The New Pcb!!!
THE POWER SUPPLY IS 232V 49.9Hz. THE BOURNOUT STARTS WHEN THE OUTDOOR UNIT FINISHES THE SEARCH OF THE NUMBER OF INDOOR UNITS ON EACH BRANCH PROVIDER.
THERE ARE TWO RESISTORS OF 39Ω/10W EACH ON THE PCB THAT GET OVERHEATED. THEN THE U2 APPEARS.
THE FOUR PCBs WERE CHANGED THE LAST 10 MONTHS AND THERE WAS NOT A FAULT SINCE THEN.
CAN ANYONE HELP?
THERE WAS A PCB BURNOUT AT FIVE OUTDOOR UNITS (OUT OF 100 SAME UNITS INSTALLED AT THE SITE).
THE FAULT CODE WAS U2.
WE CHANGED THE FAULTY PCBs.
FOUR OF THE UNITS ARE WORKING PROPERLY.
BUT AT ONE OF THEM THE SAME PROBLEM OCCURED.
[U2 FAULT & PCB BURNOUT].
The Unit Did Not Run At All After The Pcb Replacement Because Of The "u2" Fault. All Connections Were Double Checked.
I Mean That The Unit Did Not Run A Few Days Before The New Burnout. It Happened When We Tried To Start The Unit With The New Pcb!!!
THE POWER SUPPLY IS 232V 49.9Hz. THE BOURNOUT STARTS WHEN THE OUTDOOR UNIT FINISHES THE SEARCH OF THE NUMBER OF INDOOR UNITS ON EACH BRANCH PROVIDER.
THERE ARE TWO RESISTORS OF 39Ω/10W EACH ON THE PCB THAT GET OVERHEATED. THEN THE U2 APPEARS.
THE FOUR PCBs WERE CHANGED THE LAST 10 MONTHS AND THERE WAS NOT A FAULT SINCE THEN.
CAN ANYONE HELP?