Control Module HVAC: Testing and Inspection

Measurement Values, Control Module Connections

The following pages contain instructions and values for checking of the ACC-unit.

Keep in mind:
- Observe the measurement conditions. Use common sense when considering the test results and measurement values.

- First, check that the control module is supplied with power and that it is grounded.
Then, check all sensor inputs and signals from other systems.
Finally, check the control module outputs. Remember that the measured values do not indicate if the switch works or not.

- If a measured value is incorrect, use the wiring diagram to find out which leads, connectors or components that should be checked further.

- The indicated values refer to calibrated Fluke 88/97.

- The measured values indicate the pulse relation and pulse length of the signal. Test instrument with pulse quotient measurement respective pulse width measurement must be used.












ACC-Unit, Control Module Connections