ThermoFlex-Manual - 第91页
Thermo Scientic ThermoFlex 7-3 Section 7 Er ror Code Reaction Cause Actions Hi t Chiller reaction depends on ALr setting chosen in the Setup Loop , see Section 4. Note If the chiller does shut down it can be restarted p…
Thermo Scientic ThermoFlex 7-2
Section 7
Error Code Reaction Cause Actions
HiFLo
Chiller reaction depends
on ALr setting chosen in
the Setup Loop, see Sec-
tion 4. (Chiller equipped
with a ow transducer.)
The process uid ow
rate has exceeded the
adjustable high ow
setting’s value.
• If the chiller is still running press enter to see if the code clears, the
limit may have been only temporarily exceeded.
• Verify your HiFLo setting, see Section 4, and adjust setting if
necessary.
• Check all application and plumbing shut off valves for correct
position.
• Adjust ow if chiller is equipped with an optional ow control valve,
see Section 5.
• If ow transducer was recently calibrated double check calibration, see
Section 8.
Hi P1
Chiller reaction depends
on ALr setting chosen in
the Setup Loop, see Sec-
tion 4.
The pump’s high
discharge pressure
exceeded Setup Loop
high alarm value.
•If the chiller is still running press enter to see if the code clears, the
limit may have been only temporarily exceeded.
•Verify your Hi P1 setting, see Section 4.
• Check application valves and ensure that they have not changed or
closed. Note If routine shut-off of the process ow is required then
an external pressure relief valve should be added, see Section 5.
•May occur as a result of changing the internal DI cartridge.
Disconnecting the cartridge adds an additional 0.5 gpm to the main
ow. See Section 5.
•Check for debris in the application or external lters.
• Double check uid lines. Excessive bends, long tubing and diameter
reductions can affect the pump’s discharge pressure. Note If diameter
reductions must be made, they should be made at the inlet and outlet
of your application, not at the chiller.
Thermo Scientic ThermoFlex 7-3
Section 7
Error Code Reaction Cause Actions
Hi t
Chiller reaction depends on
ALr setting chosen in the
Setup Loop, see Section 4.
Note If the chiller does
shut down it can be
restarted provided the
temperature is still within
the factory-set high xed
temperature limit. However,
the error will reoccur if the
temperature goes below the
adjustable setting and then
again exceeds it.
The process uid
temperature exceeded
Setup Loop alarm value.
•If the chiller is still running press enter to see if the code clears, the limit
may have been only temporarily exceeded.
•Verify your Hi t setting, see Section 4.
•Ensure the chiller meets all environmental requirements, see Section 3.
• Clean the air lter. Dirt and debris on the lter can prevent the chiller
from functioning at full capacity, see Section 6.
• Ensure that the heat load being applied to the chiller is not too high.
Contact Thermo Fisher for assistance on calculating heat loads.
•Bring cooler air in from another area or exhaust the hot air into another
location using an auxiliary fan.
•Verify/adjust controller PID values, see the end of this section.
HPC
Chiller will shut down. High refrigeration
pressure.
Air-cooled chillers
• Ensure that the ambient temperature is not exceeding the recommended
range, see Section 3.
•Ensure chiller has adequate ventilation, see Section 3.
• Clean the air lter. Dirt and debris on the lter can prevent the lter
from functioning at full capacity, see Section 6.
•Bring cooler air in from another area or exhaust the hot air into another
location using an auxiliary fan.
Water-cooled chillers
•Ensure the plastic plugs were removed from the facility connections.
•Ensure facility water is on and connected.
•Check facility water ow rate and pressure.
Thermo Scientic ThermoFlex 7-4
Section 7
Error Code Reaction Cause Actions
LLF
Chiller will shut down.
Optional auto rell shuts
down.
Reservoir uid level too low
for normal operation.
The auto rell time chosen
for the customer adjustable
ll setting in the Setup Loop
is set to 0 and the chiller is
congured to shut down, see
Section 4
•Excessive evaporation. Ensure the chiller is operating with the
funnel and cap in place.
•Check for leaks.
•Check rEFil settings and adjust if necessary, see Section 4.
• Add uid to the tank.
LoFLo
Chiller reaction depends on
ALr setting chosen in the
Setup Loop, see Section 4.
(Chillers equipped with a ow
transducer.)
The process uid ow
rate has gone below the
adjustable setting’s value.
•If the chiller is still running press enter to see if the code clears,
the limit may have been only temporarily exceeded.
•Verify your LoFLo setting, see Section 4.
•Adjust ow if chiller is equipped with an optional ow control
valve, see Section 5.
• Check all valves in your application and plumbing lines to ensure
that they have not changed or closed.
•If ow transducer has recently been calibrated, double check
calibration to ensure it was done properly, see Section 8.
Lo P1
Chiller reaction depends on
ALr setting chosen in the
Setup Loop, see Section 4.
Pump’s low discharge
pressure is below Setup Loop
low alarm value.
•If the chiller is still running press enter to see if the code clears,
the limit may have been only temporarily exceeded.
•Ensure that chiller reservoir level is not too low.
•Verify your LoP1 setting, see Section 4.
• Chiller requires >3 PSIG application pressure drop. If a bypass
valve has been installed, some restriction may need to be added to
the bypass line.