Product specifications

Internal Battery / SB821 External Battery/SB822 Rechargeable External Battery Section 5
208 3BSE036351-510 A
Internal Battery / SB821 External Battery/SB822 Rechargeable External
Battery
The PM891 unit does not contain internal battery.
Table 30. Internal / SB821/SB822 External Battery/– Fault-Finding
Fault Possible Cause and Corrective Action
B(attery) LED indicator on
PM8xx processor unit is
flashing
Internal battery
• Renew the PM8xx internal battery
SB821:
• Check external battery connections.
If condition persists:
• Renew the External battery, see SB821
External Battery Unit on page 195.
SB822:
• Check external battery connections.
If Charge LED and or Power LED on SB822 are
turned off:
• Check 24V supply connections.
If condition persists:
• Renew the Li-Ion battery package, see
SB822 Rechargeable External Battery Unit
on page 197.
The system time is incorrect
following a power failure
Renew the External Battery.