Maintenance and Service 8-21
Error Messages and Troubleshooting
The table below provides basic information on the errors generated
by the Model 3775 CPC, and suggestions for corrective action.
When an error occurs, the status bar at the top of the screen turns
red and the error is displayed e.g., “Saturator temp out of range.”
When multiple errors are present “Multiple Errors” is indicated. To
help determine the type of errors, refer to the Status Screen (see
Figure 4-9). The number presented in the right column appears red
if out of range. Refer to
Table 8-3 to help identify the problem.
When the pump is turned off in User Settings (
Figure 4-5), the error
bar turns yellow and “Pump off” is indicated.
When called upon to remove the cover for service in the
troubleshooting table, follow instructions below:
1. Read warnings and cautions at the beginning of this chapter.
2. Unplug the instrument and remove the instrument cover by
loosening the six side panel screws (they don’t have to be fully
removed). Lift the cover up. Do not remove the screws holding
the clear butanol reservoir cover.
Table 8-3
Troubleshooting
Problem Description Problems/Suggestions
Status:
Concentration out of
range
Concentration exceeds the
specification of 10
7
particles/cm
3
.
Concentration entering the CPC is too high.
Dilute the aerosol before it enters the CPC
Status: Saturator
temp out of range
Saturator temperature out of
range ~±0.5 degree C.
Warm up is not complete, instrument is operating in
an environment outside its specified operating range
(10 to 35
°C), or instrument was removed recently
from a temperature extreme.
Place instrument in an appropriate environment,
allow temperature to stablize.
Status: Condenser
temp out of range
Condenser temperature out of
range ~±0.5 degree C.
Warm up is not complete, instrument is operating in
an environment outside its specified operating range
(10 to 35
°C), instrument was removed recently from
a temperature extreme, or fan flow is impaired.
Place instrument in an appropriate environment,
allow temperature to stablize. Clean or replace fan
filter, remove object blocking fan flow.
Status: Optics temp
out of range
Optics temperature out of
range ±2 degrees C.
Warm up is not complete, instrument is operating in
an environment outside its specified operating range
(10 to 35
°C), or instrument was removed recently
from a temperature extreme.
Place instrument in an appropriate environment,
allow temperature to stabilize.