Tait TB8100 Service Manual

TB8100 Service Manual Power Management Unit Fault Finding 225
© Tait Electronics Limited September 2006
Task 2 —
Check Indicator
LEDs
The indicator LEDs on the front panel are used to indicate the state of the
PMU and its microprocessor. There are two LEDs, one red and one green.
Each LED can be on, off, or flashing at two rates (fast or slow). The state
of these LEDs can indicate a number of operating modes or fault conditions,
as described in Table 13.2.
Table 13.2 PMU indicator LED states
Green Red PMU condition Procedure
off off power off (input above or below safe
operating range)
■ check PMU is turned on
■ check power supply/power
connectors
flashing
(3Hz)
off no application firmware loaded use the Service Kit to download the
firmware, then recalibrate the PMU
on off the microprocessor is operating; no
alarm detected
–––
on flashing
(3Hz)
one or more alarm conditions
detected:
■ output is overvoltage
■ output is undervoltage
■ output is current-limiting
■ overtemperature
■ mains failure
■ battery voltage is low
■ battery voltage is high
■ shutdown is imminent
■ DC converter is faulty
■ battery is faulty, or DC converter is
switched off
■ auxiliary power supply is faulty
■ PMU is not calibrated
■ self-test has failed
■ PMU is not configured
go to Tas k 3
flashing
(on 300ms,
off 2700ms)
flashing
(on 300ms,
off 2700ms)
PMU is in battery protection mode go to “DC Module” on page 230
flashing
(on 300ms,
off 4700ms)
flashing
(on 300ms,
off 4700ms)
PMU is in Deep Sleep mode go to “DC Module” on page 230
flashing
(3Hz)
flashing
(3Hz)
Service Kit LED test - LEDs flash
alternately
–––

Tait TB8100 Specifications

General

Brand	Tait
Model	TB8100
Category	Accessories
Language	English