Carrier 33ZCVAVTRM Specifications Page 222

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24
The next step in checking out an installation is to verify that the power
supply is operating.
1. Apply 120 Vac or other line voltage to the primary side of the
power supply.
2. Ensure that 24 Vac + 15% is present on the power connector
before you plug it into the module.
The Universal Controller features the diagnostic LEDs shown in the figure
below.
The following table shows the status of the Universal Controller as
indicated by the blink rate of the red LED.
Blink Rate Status
0.5 Hz (blink) Normal
1.0 Hz (blink, 80% duty cycle) Start-up Mode
On (not blinking) for less than 30 seconds Initializing
.25 Hz (blink) Database Error
Steady on or erratic blink Failure
Table 2
Universal Controller Status
Power Supply
Diagnostic LEDs
Figure 15
Diagnostic LEDs
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