Automatic Notification Of Abnormal Situations; Password Protection; Provision For Add-On Expansion Capability; Diagnostic And Calibration Assists. - NuAire NU-5510 Operation And Maintenance Manual

8.3.4

Automatic notification of abnormal situations

The red alarm LED on the control panel indicators will light to indicate a fault within the system.
An audible alarm is also heard.

System intermittent

Temperature Control Fault




CO



NOTE: See Section 11 for all alarm conditions.
8.3.5

Password Protection

If desired, the NuAire Incubator Control Electronics may be configured to prevent users who are
unauthorized to change the set points (CO
initiate a Decon Cycle. The password protection may be initiated by accessing the option
configuration parameters in diagnostic mode (see Section 8.8). Once the password protection is
initiated, the user must use the correct sequence of the UP, DOWN, and SELECT keys to access
the setup mode. To operate, first press the SETUP key. The displays will then indicate "Pas rEq",
or "password required", then enter the correct sequence of the UP, DOWN, and SELECT keys
followed by pressing and holding the SETUP key for three seconds to access the setup mode.
8.3.6

Provision for add-on expansion capability

 Chart recorder output (option)
 Automatic tank switch (option)
 RS-232 output
8.3.7

Diagnostic and calibration assists.

 Individual analog inputs may be displayed to assist calibration.
 Individual outputs may be forced to an on or off condition.
 Individual digital inputs may be displayed.
 Front panel lamps may be tested.
 Memory and internal processor diagnostics may be selected.
 All options may be individually tested.
 Packaging is designed such that all accessories are easily removed and replaced
8.4 Front Control Panel Descriptions
The system front control panel contains the following functions (BCD-09709).
8.4.1 Heat Jacket Status LED
The green LED indicates when the chamber heater is turned on. A blinking LED indicates the
chamber heater is being cycled to maintain chamber set point temperature.
8.4.2 Inject CO
The green LED indicates when the CO
When it blinks on/off briefly, the system is injecting CO
8.4.3 Door Ajar Status LED
The door ajar yellow LED indicates when the inner glass door is not closed and latched. The LED
acts upon a magnetic switch located along the lower right corner of the inner glass door. The LED
blinks after door is closed, indicating door delay time (40 second default)
OM0135
Temperature is over set point by more than 1.0C.
Temperature does not reach set point within 4 hours within 0.2º.
Sensors disagree by 4º
Control Fault
2
CO percent is over set point by more than 1%.
2
CO percent does not reach set point within 30 minutes within 0.2%.
2
Tank Switch
Status LED
2
%, Temp), running conditions of the Incubator or
2
control valve is open and CO
2
to maintain set point.
2
20
is flowing into the chamber.
2