ThermoFlex-Manual - 第93页
Thermo Scientic ThermoFlex 7-5 Section 7 Er ror Code Reaction Cause Actions Lo t Chiller reaction de- pends on ALr setting chosen in the Setup Loop , see Section 4. Note If the chiller does shut down it can be restarted…
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.
Thermo Scientic ThermoFlex 7-5
Section 7
Error Code Reaction Cause Actions
Lo t
Chiller reaction de-
pends 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
above the factory-set
low xed temperature
limit. However, the
error will reoccur if
the temperature goes
above the adjustable
setting and then again
drops below it.
Process uid temperature is
below 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 Lo t setting, see Section 4.
• Ensure that the ambient temperature is not below the recommended
low-range, see Section 3. If your application load is constant and/
or the lower temperature can be temporarily tolerated, then continue
operation. (The ThermoFlex will control setpoint when sufcient heat
is added.)
•Verify/adjust controller PID values.
• Add insulation to external plumbing lines to reduce the heat-loss to the
environment.
•For water-cooled chillers check facility water temperature.
o FLo
Chiller will shut
down.
There is an overow condition
in the reservoir.
•Ensure the reservoir was not lled above the MAX LEVEL line.
•Check for clogged reservoir lter.
oL
Chiller will shut
down.
(Chillers equipped
with 3-Ф pump
motor overload.)
Pump motor overload activated.
Pump motor exposed to
excessive current due to high
pressure, ow or ambient
temperature.
•Allow pump to cool down.
oL 2
Chiller will shut
down.
(Chillers equipped
with 3-Ф fan.)
Fan motor overload activated. •Allow chiller to cool down.
•For air-cooled chillers, clean the air lter
PHEr
Chiller will shut
down. (3-Ф chiller
only)
Phase rotation is wrong.
• Disconnect chiller from power source and reverse any two line
conductors on the line side of the main circuit breaker.
Thermo Scientic ThermoFlex 7-6
Section 7
Error Code Reaction Cause Actions
rEFiL
Auto rell will shut off.
Chiller reaction depends
on ALr setting chosen in
the Setup Loop, see Sec-
tion 4.
Auto rell will shut off.
Chiller will continue to
run.
(Optional display.)
The uid level did not reach
the minimum operating level
within the time chosen for the
customer adjustable ll setting,
chosen in the Setup Loop, see
Section 4.
The auto rell successfully lled
within the time frame chosen
for the customer adjustable ll
setting, but the chiller tried to
rell 5 times in 40 hours.
•Check auto rell connection.
•Check for leaks.
• Check the supply pressure on the auto rell supply line. With low
pressure the auto rell time span setting may be set too low and
the reservoir does not have time to ll.
•Check rEFil settings and adjust if necessary, see Section 4.
SEr 1
Chiller will continue to
run.
Periodic service may be required. •To clear the message see Section 8.
Er 4
Chiller will not start. Normal if new software installed
and all values in the Setup
and Tune Loops were reset to
factory defaults.
•Clear the error code.
Er 15
Chiller will continue to
run.
(Chiller equipped with
serial communications.)
Momentary disruption of the
internal communications to
control board.
•Clear the error code
Check the serial communication connection.
•See serial communication connections in Appendix D.
Er 16
Chiller continues to run. Bad sensor calibration detected
several seconds after performing
a calibration.
•Redo calibration, see Section 8.