RC 1.1, RC 1.2 (advanced)+
6 Maintenance
Always observe the applicable safety- and operating regula-
tions when performing any type of maintenance. Please refer
to the original operator's manual on the included CD or online
at www.buehler-technologies.com for maintenance informa-
tion.
7 Service and Repair
Please refer to the original operator's manual on the included
CD or online at www.buehler-technologies.com for a detailed
description of the unit including information on
troubleshooting and repair.
7.1 Troubleshooting
Problem /
Possible cause
malfunction
Condensate
• Condensate trap
inside the gas
full
output
• Valve inside the
automatic con-
densate drain
may be stuck
• Cooler overload
Reduced gas
• Gas circuit
flow rate
clogged
• Condensate out-
put iced over
Excess tem-
• Operating point
perature
not yet reached
• Cooling output
too low despite
the cooler run-
ning
• Flow rate / dew
point / gas tem-
perature too high
• Built-in fan
stopped
Temperature
• Control unit fail-
low
ure
No cooling
• Compressor
doesn't start up
Fuse is trig-
• Increased com-
gering
pressor current
consumption due
to faulty com-
pressor start-up
7.1.1 Error Messages in the Display
If an error occurs, the display will read "Err". Press the "
button to show the error number(s).
16
Bühler Technologies GmbH
Error messages will appear until the unit has been restarted
or the error is cleared using the "Func" button. It can only be
cleared if the cause for the error has been corrected.
Causes / Action: The following is a list of the most common
causes and actions for the respective error. If the actions listed
do not resolve the problem, please contact Service.
No display
Action
(perman-
• Empty condensate
ent)
trap
• Flush in both direc-
tions
• Maintain limits
• Remove and clean
heat exchanger
• if necessary, re-
place filter ele-
ment
• Send in unit
• Wait (max. 20 min)
• Ensure the vents
are not covered
(heat buildup)
• Maintain limits /
install pre-separ-
ator
• Check and replace
if necessary
• Send in cooler
• Compressor PTC
not cooled down
sufficiently. Wait 5
minutes and try
again.
• Compressor PTC
not cooled down
sufficiently. Wait 5
minutes and try
again.
"
Problem /
Possible cause
malfunction
• No voltage
• Loose connect-
ing cable
• Display defect-
ive
D1.02 (The software ver-
sion for the display
will appear).
• Not commu-
nicating with
the controller
Error
• An error has
occurred
Error
• Controller
01
malfunction
Error
• Microcontrol-
03
ler fault /
MCP2
Error
• EEPROM error
04
Error
• Moisture de-
22
tector 1 cable
break
Error
• Moisture de-
32
tector 2 cable
break
Error
• General error
40
temperature
sensor 1
Error
• Low temperat-
41
ure / short-cir-
cuit temperat-
ure sensor 1
Error
• Excess temper-
42
ature / short-
circuit temper-
ature sensor 1
Error
• Measurement
43
fluctuation
temperature
sensor 1
Action
• Check the supply
cable
• Check fuse
• Check connec-
tions
• Check connec-
tions
• Read the error
number as de-
scribed above
• Clear error (tem-
porary fault)
• Disconnect from
power for ap-
prox. 5 s
• Contact service
• Contact service
• Contact service
• Check moisture
detector line
• Check moisture
detector
• Check moisture
detector line
• Check moisture
detector
• Sensor possibly
defective
• Check temperat-
ure sensor con-
nection
• Check temperat-
ure sensor con-
nection
• Check temperat-
ure sensor con-
nection
BX450028 ◦ 10/2020