Thermo Fisher Scientific Model 60
i
Quick Start Guide
11
Troubleshooting
The following table describes possible power-up failures and provides the recommended action to take to
restore the system to normal operation.
Troubleshooting Power-Up Failures
Malfunction
Possible Cause
Action
Does not start - the light on the power switch
does not come ON.
No power or wrong power
configuration
Check the line to confirm that power is available
and that it matches the voltage and frequency
configuration of the instrument.
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. Replace fuses as necessary.
Bad switch or wiring
connection
Unplug the power cord, disconnect the switch and
check operation with a multimeter. Replace switch
as necessary.
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, the
power is OK.
Display failure
If possible, check instrument function through RS-
232 or Ethernet.
Reboot
instrument.
Ribbon cable disconnected
Check ribbon cable on side of display board.
The following table describes possible alarm messages that may be displayed during start up and
provides the recommended action to take to restore the system to normal operation.
Troubleshooting Alarm Messages
Alarm
Message
Possible Cause
Action
Sample Flow
Pump defective
Pump disconnected
Defective or disconnected flow
switch cable
Improper alarm threshold setting
Plumbing connection/configuration
Repair or replace pump.
Connect pump.
Check flow switch cable.
Reset the alarm threshold.
Check plumbing connections.
Bench Temp
Instrument not warmed up
Allow more time for instrument to reach proper operating temperature.
Heater not plugged in
Plug in heater.
Defective heater or defective heater
wires
Check resistance of heater wires. Unplug heater connector and use an
ohmmeter to measure resistance across pins 3 and 4. Normal resistance
should be approx. 290
Ω.
A higher resistance reading indicates that a heater
is defective. Checking pins 1 and 2 should result in a 10K
Ω
reading. An
open reading indicates a failed heater or wiring.
Improper alarm threshold setting
Reset the alarm threshold.
Overheating – fan problem
Check fan operation.
Detector
Board Status
Cable voltage
Optical pickup not plugged in
Check cable.
Plug in optical pickup.
NOTE
The following board related alarms only occur during power up or reboot.
Alarm -
Interface
Status
Alarm - I/O
Exp Status
Alarm -
Motherboard
Status
Internal cables not connected
properly
Defective board
Check that all internal cables are connected properly. Cycle AC power to
instrument.
If still alarming, change board.
