ThermoFlex-Manual - 第92页
Thermo Scientic ThermoFlex 7-4 Section 7 Er ror Code Reaction Cause Actions LLF Chiller will shut down. Optional auto rell shuts down. R eser voir uid lev el too low for nor mal operation. The auto rell time chosen f…
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.
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.