Thermo Scientific Mercury Freedom 80i, Manual

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Troubleshooting
System Troubleshooting Guides
4-4 Mercury System Manual Thermo Fisher Scientific
Malfunction Possible
Cause Action
Main fuse is
blown or
missing. Unplug the power cord, open the fuse drawer on
the back panel, and check the fuses visually or
with a multimeter.
Bad switch or
wiring
connection Unplug the power cord, disconnect the switch and
check operation with a multimeter.
Display does not
come on - light on
power switch does
come on.
DC power supply
failure Check the green LED on the back edge of the
power supply. If the LED is off, the power supply
failed.
DC power
distribution
failure
Check surface mount LEDs labeled “24V 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.
Reboot instrument.
Contact Thermo Fisher Scientific Service
Department.
Table 4–3
describes the alarm messages for the 80 i and the 81 i . The 81 i
alarms are indicated with “Alarm 81 i ” in the Alarm Message description.
When a reference to a manual is included in the Action description, go to
the associated manual, such as the 80
i or 81 i , not this “Mercury System
Manual.”
Table 4–3. Troubleshooting – Alarm Messages
Alarm
Message Possible Cause Action
Alarm 81 i -
Ambient Temp
Instrument
overheating Replace fan if not operating properly.
Clean or replace foam filter, refer to the
“Preventive Maintenance” chapter in the manual.
Alarm -
Blowback
Pressure Low pressure - leak Perform a leak test.
High pressure Check blowback pressure set point.
Alarm - Chamber
Temp Chamber
temperature below
set point Check 10K thermistor, replace if bad.
Heaters failed Check connector pins for continuity.
Alarm - Low or at ambient Check voltages and continuity.
Alarm Messages