Section 11
41
Troubleshooting
11
SECTION 11 - TROUBLESHOOTING
Heating System
Symptom Cause Action
Wrong temperature and the
alarm is on
The temperature has not
stabilised within 0.5°C of the
setpoint.
Ensure all lids are closed and wait for
the temperature to stabilise.
Wrong temperature on
touchscreen aer system
has had time to stabilise
The setpoint for temperature
is wrong
Check the setpoint temperature and
adjust to the required temperature.
Temperature diers between
chambers
System not properly
calibrated
Calibrate each chamber using a high
precision thermometer
CO
2
Gas Regulator
Symptom Cause Action
Wrong CO
2
level
measured at sample
port
System not powered on Check mains and main fuse
CO
2
gas regulator is OFF Activate CO
2
gas regulator
No CO
2
or wrong gas attached to
CO
2
gas input
Check gas supply, make sure that 0.5-
1.0 bar of gas pressure is applied
Actual gas concentration is
higher or lower than setpoint
Check CO
2
setpoint and adjust to the
required concentration
Actual gas concentration is
higher or lower than setpoint
Recalibrate the gas concentration
Poor CO
2
gas
regulation
Lid(s) are le open Close lid(s)
Seals are damaged or missing on
lid(s)
Check the seals are intact
CO
2
concentration
alarm
CO
2
gas concentration more than
± 1% from setpoint
Allow system to stabilise by closing all
lids
CO
2
pressure alarm
No/wrong CO
2
gas pressure to
system
Check CO
2
gas supply; make sure that
pressure is kept stable at 0.5-1.0 bar
O
2
Gas Regulator
Symptom Cause Action
Wrong O
2
level
measured at sample
port
System not powered on Check mains and main fuse
O
2
gas regulator is o Activate O
2
gas regulator
No N
2
or wrong gas type
attached to N
2
gas input
Check gas supply; make sure that 0.5-
1.0 bar of N
2
gas is applied
Actual gas concentration is higher
or lower than setpoint
Check O
2
setpoint
Actual gas concentration is higher
or lower than setpoint
Calibration of the gas concentration is
needed
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