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Warm Start
The Warm Start is the abnormal start-up mode for the bath and it occurs only if the power was
previously off for a period of less than about two seconds, or if a fault was detected in the
microprocessor during the Self-Test Sequence. If the CT-2000 Process Function Monitor senses a
momentary or ongoing failure in the system hardware and/or software, the heating elements are
shut down and the system is reactivated in Warm Start mode. The keypad lights flash in a repeating
pattern and the heater power is disabled (heating LED will not light).
The display will appear as shown in Figure 18.
If this condition occurs:
1. Turn the BATH power switch off.
2. After waiting at least five seconds, turn the BATH power switch to the ON position and wait for
the display to indicate either a warm or cold start again.
3. If the bath comes up in a Cold Start condition and starts its normal self-test sequence, it is likely
that a momentary power interruption caused the Warm Start condition and no further action is
required.
4. If the bath continues to enter the Warm Start condition, consult CANNON for further assistance.
Self-Test Sequence
The CT-2000 start-up includes a self-test procedure encompassing key components of the system.
These tests, which are displayed on the LCD during start-up, are described in Table 2.
Test
Display
32K Ram
Pulse Width Modulator
Figure 18: Warm Start Display
Table 2: CT-2000 Self-Test
Test Purpose
Verifies function of the liquid crystal display (LCD) screen. User may
visually check for bad segments on the display.
Verifies normal operation of CT-2000 system memory.
Verifies function of the PWM.
CANNON Instrument Company | Bath Operation
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