Fault And Alert Codes; Fault Codes - Somnetics Transcend Auto User Manual

Transcend Auto User Manual

Fault and alert codes

Fault codes

When the Transcend Auto encounters a fault the processor resets and enters a fault loop.
In this loop, the device repeatedly flashes the yellow fault LED to indicate the specific fault
encountered. If the device is reset or power cycled while in fault mode, it re-enters fault
mode upon power up. To exit fault mode, the fault must be acknowledged by holding the
power button down until the fault LED stops flashing. At this point, when the power button
is released, the processor resets and the device powers up in standby mode.
Note: It is recommended that the user attempt to reset any failure when it is first
observed on the device, as transient issues may cause the device to enter a failure
mode without any actual device malfunction or failure. If the fault code reoccurs
after device reset, the below table summarizes likely unit response, potential
device issue(s) and troubleshoot suggestions associated with the Transcend unit.
Device Fault
LED LED
Off Flashes 2
times
Off Flashes 3
times*
Off Flashes 4
times*
Off Flashes 6
times
Off Flashes 7
times*
Off Flashes 9
times
Off Flashes
11 times
Off Flashes
12 times
Error Comments
Stack overflow Internal software fault.
Pressure too high While delivering therapy, the pressure sensor measured a
pressure greater than 30 cmH2O. This could be due to a
"pinched" or disconnected pressure sense tube. This could also
be due to faulty pressure sensor or electronics.
No Pressure While delivering therapy, the pressure sensor measured
approximately 0 cmH2O. This could be due to an open output
hose. This could also be due to a "pinched" or disconnected
pressure sense tube. This could also be due to faulty pressure
sensor or electronics.
Attempt to set An attempt was made to set the device real time clock (RTC)
invalid time to an invalid value. The device RTC is configured as part of the
manufacturing process, thus this error should only occur then.
Pressure sensor While in standby, the pressure sensor reads a value outside its
out of range expected range. This could be due to a "pinched" or blocked
pressure sense tube or fluctuation in ambient temperature
This could also be due to faulty pressure sensor or electronics.
Bad firmware At power up, the device calculates a checksum of the firmware
checksum code and compares it against the checksum it calculated when
it was initially programmed. This error indicates some part of
the firmware has been corrupted. Likely causes would be
electrostatic discharge or hardware problem.
Stalled blower While delivering therapy, the device failed to detect any
blower motion for 2 seconds. This is likely due to a faulty
blower motor, loose blower connector or faulty electronics.
Low power While delivering therapy, the device determined that the
blower was stalled (see above). However, a check of the
voltage indicates there may not be sufficient power to spin the
blower. This is likely due to a faulty power supply or battery.
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