VWR CO2 Incubator Basic - Failure Code List

VWR CO2 Incubator Basic | 49
Handling and control |
Chapter 7
Failure code list
Code Description Cause Repair
No values displayed Communication between
display and CPU- main
board faulty
Contact Service
42 NV RAM read failure NV RAM faulty,
default values loaded
Contact Service
43 NV RAM read failure NV RAM faulty,
mirrored values loaded
Contact Service
44 NV RAM faulty
CO
2
measuring cell values
not overwritten, device
works with default values
Contact Service
54 Manipulated variable
failure
Calculation error, device
performed RESET
Contact Service
55
I
2
C bus failure
Data transfer faulty,
measured value quality
dropped below 50%
Eliminate source of interference,
e.g. cellular phone
66
Deviation of temperature
sensors from one another
Temperature signal plau-
sibility doubtful
Contact Service
77 CO
2
cal range exceeded Max. adjustment value
exceeded
Contact Service
88 Failure upon auto-start Total time elapsed or max.
adjustment value
exceeded
Repeat auto-start
99 Device doors open Doors open for more than
10 minutes, door switch
Close device doors, test door
switch for correct function
100 Temperature below
nominal value
Actual value < nominal
value –1 °C
Contact Service
101 Temperature above
nominal value
Actual value > nominal
value +1 °C
Do not exceed ambient
temperature limit
104 Temperature sensor
faulty
Sensor circuit
open/shorted
Contact Service
200 CO
2
below nominal value Act. val. < nom. val. –1%
 No CO
2
 Prepressure low
 Supply line blocked
Check gas supply:
 Connect new gas cylinder
 Raise prepressure to 1 bar
 Check supply line to device
201 CO
2
above nominal value Act. val. > nom. val. +1%
 Prepressure high
Check gas supply:
 Reduce prepressure to 1 bar
204 CO
2
measuring cell
faulty
Sensor circuit
open/shorted
Contact Service
500 Temperature 90°C rou-
tine below nominal value
Actual value < 85°C Repeat decontamination routine,
contact service as required
501 Temperature 90°C rou-
tine above nominal value
Actual value > 85°C Contact service
502 Failure in 90°C routine Power failure during heat-
ing or holding phase
Silence alarm by pressing key
90°C (2 times 5 sec.), then
restart routine