BUCHI Inert Loop B-295 - Manual (Page 63)

8 Troubleshooting
63 B-290 Operation Manual, Version I
Table 8-1: Error messages and their remedy (cont.)
Code Description Possible cause Corrective measure
203 Pressure alarm not given
during start-up Pressure switch defective or conta-
minated Contact the BUCHI customer
service
204 Humidity sensor above
threshold Molecular sieve saturated with water Exchange the molecular sieve bag
and regenerate the used one
8 .2 Malfunctions and their remedy
Table 8-2: Malfunctions and their remedy
Malfunction Possible cause Corrective measure
Equipment cannot be switched on No voltage
Fuse has blown
Insert mains plug/examine plug for
damage
Replace the fuse (3.15 A)
Peristaltic pump does not deliver The rollers are not in contact with the
running surface Elevate the running surface with the
lever
Adjust the lifting height of the running
surface with the hexagonal allen key
from beneath
Product is delivered after the
spray flow is switched on although
the pump is switched off The pressure of the rollers on the
running surface is too weak Adjust the lifting height of the running
surface with the hexagonal allen key
from beneath
Aspirator is noisy The aspirator is dirty
The operating mode is set to “Blow” Clean the aspirator
If no discharge filter is fitted, this
should be done to avoid further
contamination of the aspirator
Reset to “Suction” mode if possible
System does not heat up Heating circuit not plugged in
Heating is not switched on
Nominal entry temperature is below
room temperature
Fuse has blown
Heater defective
Faulty tubing system
(Faulty flow direction or no flow in the
heating system) Plug in heating circuit
Switch on heating circuit
Pre-select a new inlet temperature
Replace fuse (12.5 A)
Contact the BUCHI customer service
Check tubing system
Nozzle blocked up Product is too concentrated
Encrustation on nozzle exit
Nozzle is not clean
Nozzle is defective (bent nozzle
needle) Use a lower concentration in pump
Increase number of pulses for nozzle
cleaning
Cool nozzle with cooling water
Completely dismantle the nozzle
(nozzle cap, tip, cleaning needle)
and clean with water
Replace nozzle or defective element