Alarm Messages; Table 4-3. Troubleshooting - Alarm Messages - Thermo Scientific Mercury Freedom 80i Manual

Troubleshooting
System Troubleshooting Guides

Alarm Messages

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