Advertisement
Troubleshooting
Troubleshooting Guides
6-2
Model 43i Trace Level-Enhanced Instruction Manual
indicate the checks that you should perform if you experience an
instrument problem.
Table 6–4. Troubleshooting - Alarm Messages lists all the alarm messages
you may see on the display and provides recommendations about how to
resolve the alarm condition.
Table 6–1. Troubleshooting - Power-Up Failures
Malfunction
Does not start
(The backlight on the
display does not come on
and the pump motor is
not running.)
Display does not come
on. (Pump is running.)
Power comes on and the
display functions, but the
pump is not running.
Possible Cause
Action
No power or wrong
Check the line to confirm that power is
power
available and that it matches the voltage
configuration
and frequency configuration of the
instrument.
Main fuse is blown
Unplug the power cord, open the fuse
or missing
drawer on the back panel, and check the
fuses visually or with a multimeter.
Bad switch or
Unplug the power cord, disconnect the
wiring connection
switch and check operation with a
multimeter.
DC power supply
Check the green LED on the back edge of
failure
the power supply. If the LED is off, the
supply has failed.
DC power
Check surface mount LEDs labelled "24V
distribution failure
PWR" on the motherboard and the
interface board. If lit, power is OK.
Display failure
If possible, check instrument function
through RS-232 or Ethernet.
Contact Thermo Fisher Scientific Service
Department.
AC power is not
Locate the three-pin connector on the
reaching the pump.
interface board and use a voltmeter to
check AC voltage across the two black
wires (should read 110 - 120V, even on
220V or 100V instruments).
Pump is jammed
Carefully rotate the pump fan to get past
due to a new or
sticking point.
stiff diaphragm.
Pump bearings
Disconnect AC power and remove the gas
have failed.
lines from the pump head, then try to rotate
the pump fan. If it is jammed, or noisy, the
motor bearings may have failed.
Thermo Fisher Scientific
Advertisement
Troubleshooting
