SECTION 3
SERHT50NA A0808 3-21
Fault, Battery System Alarm, Device Alert
(automatic)
Audible Alarm: Intermittent beep
Visual Alarm: Device Alert indicator blinks red
Message Window: FAULT BAT SYS
The status of the inter
nal battery system and the charging system is
continuously monitored and any deficiency will result in a Battery
Fault Alarm. The HT50 will continue to operate properly from an
external power source but it can not be powered by the internal
battery system.
NOTE: If the “Fault Bat Sys” device alert alarm occurs, keep the
HT50 plugged into an e
xternal popwer source. Contact Newport
Medical Technical Service Dept.
Power Switchover Alarm
(automatic)
Audible Alarm: Intermittent 3-pulse caution beeps
Visual Alarm: Ext. Power indicator illuminates red
Int.
Battery indicator blinks yellow
Messag
e Window: No ext power
The Power Switchover Alarm is activated by switching from
external power to the dual internal battery due to disconnection
from the power cord or a power interruption. Pressing the
Silence/Reset button will (1) cancel the audible alarm, (2) cancel
the “No ext power” message, (3) cancel the Ext. Power LED and
(4) cause the Int. Battery LED to change to non-blinking yellow
indicator.
If external power is connected within 60 seconds following internal
battery operation, the HT50 will immediately switch back to
external power. If internal battery operation has lasted longer than
60 seconds, there will be a delay of up to an additional 60
seconds before the HT50 will switch back to external power. If “No
ext power” message is still displayed following the re-connection
to external power, press Silence/Reset button to cancel the
message.
Device Alert Alarm
(automatic)
Audible Alarm: Intermittent beep
Visual Alarm: Device Aler
t indicator blinks red
Message Window: OCCLUSION or 10V SHUTDOWN or
FAUL
T BAT SYS or SYSTEM ERROR or
MOTOR FAULT
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