ThermoFisher Scientific 146iQ, Instruction Manual

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Troubleshooting
Troubleshooting Guide
6-2 146iQ Instruction Manual Thermo Scientific
Problem Possible Cause Action
Micro SD Card
Programming
If Micro SD card was just replaced,
re-install the old one. If the
problem is fixed, request a
replacement Micro SD card.
Instrument temperature out
of range Fan failure Replace fan if not operating
properly.
Dirty fan filter Clean or replace filter.
Overheating PCBA Locate defective PCBA reporting
the error and replace if needed.
Voltage levels out of range Poor PCBA or cable
connection Locate PCBA where out of range
voltage level is being detected and
inspect connections. Replace PCBA
if damaged.
Solenoid current out of
range (option) Sticking or damaged
solenoid Reset solenoid via Settings>Health
Check>Status and Alarms>Valve
and Pump Resets screen. If
damaged, replace solenoid valve
block.
Pump current out of range Damaged or dirty pump Reset pump via Settings>Health
Check>Status and Alarms>Valve
and Pump Resets. Inspect and
refurbish pump. If pump motor is
damaged, replace pump.
Out of range pressure high
– upstream flow Too much positive
pressure in sample line Regulate line to lower pressure, or
install flow bypass near rear panel.
Out of range pressure low –
upstream flow Ineffective pump Evaluate for refit/replacement of
pump.
Internal leak Inspect lines downstream of flow
capillary. Replace tubing if needed.
Stuck solenoid valve
(zero/span gas valve
option only) Reset valve via Settings>Health
Check>Status and Alarms>Valve
and Pump Resets. Replace
manifold valve block if necessary.
Bench temperature out of
range Thermistor
disconnected or shorted Check to ensure range corresponds
with expected value. If not, select
proper range.
High: Excessive high
temperature in
instrument, duty cycle
of temperature control
at zero
Check external temperature (must
be under 45
°
C); check rear panel
fan for operation, replace if
necessary.
Low: Excessive low
temperature in
instrument, ineffective
or disconnected heater, Check external temperature (must
be above 0
°
C); check heater
connection for disconnect or
crimps.