BUCHI Rotavapo R-220 SE - Manual (Page 83)

8 Troubleshooting
83 R-220 SE Operation Manual, Version F
Error Addition error indicator on display Possible cause Remedy
E31 Heating bath icon flashes. • Heating bath runs dry.
• Mechanical safety switch
activated.
• Switch off the unit. Let the heating
cool down.
• Refill heating transfer medium at
least to minimum level.
• Reset overtemp. safety switch
according to section 8.1.
Call service if problem is persistent.
E32 Heating bath icon flashes. • Heating bath runs dry.
• Temperature >200 °C.
• Switch off the unit. Let the heating
bath cool down below 180 °C.
• Refill transfer medium at least to
minimum level.
Call service if problem is persistent.
E33 Heating bath icon flashes. • Actual to set value difference
is higher than 15 °C.
• Electronic malfunction.
• Press “Aerate” button to confirm the
error message.
• Check set value for plausibility (e.g.
set value below room temperature).
If necessary, wait for the heating
bath to cool down sufficiently.
Call service if problem is persistent.
E40 n.a. Voltage drop or power outage. • Press “Aerate” button to confirm the
error message.
• Check mains connection for suffi-
cient power performance.
• Alternatively: Install uninterruptible
power supply.
Call service if problem is persistent.
E41 n.a. • Load limit exceeded by
external electrical consumers
(30 V).
• Electronic malfunction.
• Unplug external consumers (e.g.
valves and sensors) step-by-step.
Restart system in-between for
causal research.
• Exchange defective consumer.
Call service if problem is persistent.
E42 n.a. • Load limit exceeded by
external electrical consumers
(24 V).
• Electronic malfunction.
• Unplug external consumers (e.g.
valves and sensors) step-by-step.
Restart system in-between for
causal research.
• Exchange defective consumer.
Call service if problem is persistent.
E43 n.a. Electronic malfunction. • Restart the unit.
Call service if problem is persistent.