Good day,
In the ISP I work, there is a CCR1072 , that we changed the internal PSU2 to an external 12v and connected directly to its internal cable. It is actually, a solar panel controller, connected to a battery (12v 60ah) and supplied with a stabilized 24v Power Supply (Let´s call it PS24v). The system provides 13.8 volts to CCR when connected to power plug and around 13.3v to 11.0v(cut voltage) when supplied from battery. A change was necessary because battery was bad.
We connected the original PSU1, all OK.
Disconnect PSU2, CCR running with energy from PSU1, OK.
Installed the new Solar Controller Set (providing 13.3v, only from battery), CCR displayed that the PSU2 have been selected for use (probably because of its higher voltage). OK
Connected the PS24v (that supply Solar Controller) to power plug. OK. Voltage raised to 14.3 (higher voltage on the new system) and system working OK!
The voltage within PS2 is around 14.3,(but system health displays 13.
while charging (PS24v connected to power plug). When disconnected, it drops to 13.3v immediately, then drop slowly until it reaches 11v, cut voltage to save battery.
So,at that moment, CCR reading was PSU1 connected to power plug, 12.2v. PSU2 connected to Solar Controller 13.8v. PSU2 shows current of 3.8a.
As a test, we disconnect the PS24v, and system continued to work ok on battery. This test lasted less then a minute (voltage dropped to 13.3v measured directly from battery).
Then Power Plug was removed from PSU1.
At this stage, CCR supplied by Battery connected in the solar controller on PSU2 bay, around 13.2v on battery.
Then we plugged back the PS24v (voltage raised to 14.3v, 13.8v in /system health) and after, connected the CCR PSU1 (ORIGINAL AC Power Supply) to Power Plug.
We got ourselves a big surprise of 4 fan blowing at max, and discovered that the hardware rebooted. Right after PSU1 was connected to energy.
Does anyone know why this happened? Voltage difference between PSU1 and 2 perhaps?
Any ideas?