VWR CO2 Incubator Basic, Руководство пользователя

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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