Welch Allyn Propaq LT 802LT0N, Service Manual

Page: 21 / 80

Service Manual Troubleshooting and repair 17
Charger states and service
State Description Charger
Status
LED
Charger
Power
LED
Type of State Possible Corrective Action
0 Charger state
unknown. n/a n/a Normal initial transitory state of
very short duration. n/a
1 Monitor docked,
No-power fault. Off Off Normal operating state when the
monitor is in the cradle and the
cradle is not powered. If the power adapter is not
connected, connect it.
Fault state if the cradle fuse is
open. Replace the fuse. “Replacing the
fuse” on page 47.
Yellow On Fault—power to the monitor
automatically disconnected by the
cradle. Possible monitor fault. Attempt to recharge by removing
the monitor from the cradle and
reinserting the monitor in the
cradle.
If the fault persists, attempt to
recharge another monitor to
determine whether the problem is
with the cradle or with the
monitor main board.
Fault—no monitor in the cradle,
power input and input fuse OK. Power board fault. Replace the
power board.
“Disassembling the
cradle” on page 47.
2 Monitor docked,
charging. Green Green Normal operating state. n/a
3 Monitor docked,
temperature
fault. Yellow Green Fault—battery pack temperature is
out of range high or low. Bring the battery pack
temperature into specified range
(0° C - 40° C).
4 Monitor docked,
battery voltage
too low for
charging. Yellow Green Fault—battery pack can no longer
be charged. Replace the battery pack.
“Removing the lithium ion battery
assembly”
on page 29.
5 Monitor docked,
timeout fault. Yellow Green Fault—Battery pack failed to
charge within the specified time. Attempt again to charge by
removing the monitor from the
cradle and reinserting the monitor
in the cradle.
Replace the battery pack.
“Removing the lithium ion battery
assembly”
on page 29.
6 Monitor docked,
charging
complete. Off Green Normal operating state. n/a
7 Monitor docked,
overcharge fault. Yellow Green Fault—battery pack cells are
unbalanced or the cradle is faulty. Replace the battery pack
(
“Removing the lithium ion battery
assembly” on page 29).
Replace the power board in the
cradle (
“Disassembling the
cradle” on page 47).
8 Monitor not
docked. n/a n/a Normal operating state. n/a