The subsidiary's distributor engineer was conducting the pm on this perfusion system and he noticed that the machine was not switching onto battery.The monitors and two pumps with the battery cable were turned off when alternating current (a/c) power was off.The batteries were replaced three months ago and the voltages on them are 13 volts, indicating fully charged batteries.When on a/c, the light emitting diode (led) below shows constant green.Technical support asked the customer to check the following: check the voltage on p7 connector, not each battery and should get around 25 volts direct current (vdc).If nothing, you have a blown fuse.Check continuity across f1/f2.Both fuses should have continuity.If either one is blown, the system will not switch to battery.Per email from the subsidiary site, the system was completely charging and discharging, so it should be fine regarding the battery issue.
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