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Troubleshooting
Problem
Heater system has
cold air blowing from
the heater tube.
Heater system has
cold air blowing from
the heater tube.
Heater system has
cold air blowing from
the heater tube.
No gate detected by
MR scanner.
No gate detected by
MR scanner.
C-2
Possible Cause
Wrong set point.
Power is not on.
Control signal not
present.
Improper gating setup
selection.
Improper switch
setting on ERT
Control/Gating
Module.
Revision C, August 2013
Corrective Action
Check that the set point is
greater than the measured
temperature.
Check power to the Heater
Module. A green LED
indicates power. Check AC
connection.
Power indication OK, but Heat
LED not flashing. Check the
fiber optic connection to the
Heater Module. Red light
should be present in the end of
the fiber to turn on the heater
element. Check the
temperature probe, set point
and connections at the ERT
Control/Gating Module. Select
"On/Off with PWM Max Heat"
in HEATER window.
Check for the presence of
trigger output to the scanner
(white dots in Cardio Sweep
display). If trigger is not
present check selections in
Gating Setup menu.
Check for the presence of
trigger output to the scanner
(white dots in Cardio Sweep
display). If trigger indication is
present check gate output
pulse signal characteristic
switch setting is appropriate for
the MR scanner.
See
6-3
6-1
6-1
6-3
3-2
3-8
3-2
3-5
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