TSLM - M601 Operational & Install Manual
Operation
Introduction
The following sections describe the working of the TSLM (firmware version 3.1 or later) in detail.
Near the end of this chapter we provide the various checklists and error codes on one page for
your convenience.
Power-up (Master ON)
When first the TSLM is powered it turns on the TSLM light for about 2 seconds while it does a self-
check. If everything checks out the TSLM light is turned off. If a problem or concern is detected the
TSLM light indicates as follows:
Problem or Concern TSLM light indication
EHT Error:
The EHT valve is being powered externally from the
TSLM due to possible wiring problem
4 blinks.. pause.. 4 blinks.. pause, etc
Memory Warning:
The TSLM memory used for recording start and
exceed graphs has reached the 90% mark. You may
want to retrieve this history and clear the TSLM's
memory.
7 blinks (directly after power-up)
TSLM Internal Fault:
The TSLM has failed the self-check and needs to be
serviced.
Solidly on or slowly flashing (no code)
Initiating a Start
By depressing the START button you initiate a start sequence. The TSLM performs pre-start
checks first unless commanded to bypass them (see later). It checks that the ITT is connected
properly and reads below 200ºC, that the bus voltage is at least 20 volt and that the EHT is
detected electrically. These checks have been included for safer starting and if one fails the TSLM
will decline the start and report the cause via the TSLM light as follows:
Cause of Error TSLM light indication
ITT Error:
ITT is above 200ºC or not connected properly. If
above 200ºC you may want to do a RUN to cool it
down before attempting another start.
2 blinks.. pause.. 2 blinks.. pause, etc.
Voltage Error:
The bus voltage is too low for safe starting.
3 blinks.. pause.. 3 blinks.. pause, etc.
EHT Error:
Access by the TSLM to the EHT valve could not be
confirmed electrically. The reason could be that the
limiter enable/disable switch is not in the correct
position.
4 blinks.. pause.. 4 blinks.. pause, etc
The pre-start checks can be bypassed by double-clicking the START button. The “double-click
start override” setting must be enabled in the TSLM configuration for this to work.
06/29/16 © 2016 VR Avionics page 6 of 33
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