DigiTech C0408 Section System Checkout and Failure Isolation, Initial Condition, Check OUT

IMI 66-083 Installation

SECTION 6

SYSTEM CHECKOUT AND FAILURE ISOLATION

INITIAL CONDITION GENERAL CHECK

The system operating features are set to default conditions at initial power-up. These conditions provide a basic operating system with a known set of parameters, and the system should be initially checked out with the default conditions in place. At any time while the system is operating, default conditions can be reset from station port 10 or 12 per the instructions provided in Chapter 4, Programming.

CHECK OUT

Check the common equipment and telephone installation for proper operation by performing the following resistance and voltage measurements.

RESISTANCE CHECK

Measure the resistance at the station connector blocks under the following conditions.

AC power cord disconnected from electrical outlet.

Common equipment connected to station connector blocks.

Stations wired and wiring punched down on blocks.

Bridging clips removed from blocks to isolate stations from common equipment.

Measure the resistance of each installed station and wiring from the station side of the connector blocks. Resistance values will vary with cable length and station type but should be within the following limits:

- Greater than 700 Kohms

VOLTAGE CHECK

Make the following voltage measurements at the

station connector blocks under the following conditions:

•Bridging clips installed

•AC power connected to the common equipment

Measure the voltage across the signal pair. The measured voltage must be within the following limits:

-28-36VDC

1. Check the red light emitting diode (LED) system status indicator. Be sure that it is on steady. If lt is off or flashing, refer to the paragraph below titled, Failure Isolation.

2.Refer to Chapter 5 for operating information and perform a general operational test of the system by exercising the features from station port 10 or 11. Operational parameters are per the system default conditions as detailed in Chapter 4 until class of service programming is performed.

3 . Once the basic system is verified as operational, perform the class of service programming as described in Chapter 4.

FAILURE ISOLATION

SYSTEM STATUS INDICATOR

A red LED located on the common equipment cabinet near the music port is the system status indicator. This indicator is turned on steady when power is applied to the system. If the indicator flashes after power up, it could be indicating a processor failure. Unplug and reconnect the AC power to the power supply and observe the LED indication. If it still shows a flashing indication, equipment replacement may be necessary.

STATION SELF TEST

The multiline stations can be self tested for proper operation per the following instructions:

1. Disconnect line cord at station base.

2 . Press and hold MUTE and reconnect line cord to station connector. Station will automatically perform self test routine.

3 . Release MUTE as soon as test begins. Sequence of test is as follows:

•Indicators will light in sequence

•Ringer will sound - be sure volume is set to low or high

•Indicators and ringer will then turn off at the same time

4.Replace any station that does not pass the setf test.