Central Controllers and Expansion Units Power Supply Units

After Replacement The recharging time for the battery may be up to 46 hours, depending on its state of charge. Please note that backup via the battery is only possible within limits during this time.

If the rechargeable battery does not work after replacement, there may be the following faults:

IF...

THEN...

ªRB lowº LED does not go off after 6 minutes,

the rechargeable battery is incorrectly connected or faulty or the charging circuit in the PSU is faulty.

ªRB lowº LED goes off but the relay does not pick up,

the battery has failed and the yellow ªMB lowº LED lights up or the battery compartment is faulty.

Replacing the

Rechargeable

Battery in the Fan

Subassembly

Rechargeable

battery

red

Hole

black

Fan sub- assembly

System Manual

4-45

C79000-G8576-C199-06

Page 111
Image 111
Siemens S5-135U/155U appendix Replacing Rechargeable Battery in the Fan Subassembly