TT8900 OPT
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Installation and Service Manual
Page 37 of 41
5.6
Replacing the T20 IIM Module
Tools Required: Flat head screwdriver.
In the unfortunate event the T20 IIM module needs to be replaced, follow these steps to
complete the swap and resume normal operations:
1.
Open the TT8900 OPT door using the commissioned key.
2.
Power off the UPS battery then, disconnect the TT8900 OPT unit from the mains power.
3.
Remove the data cable from the T20 SCM module, using a flat head screwdriver.
4.
While pushing the module down against the rail, swing the bottom end towards you to
release it.
5.
Install the new T20 IIM module, undoing steps 3-1.
6.
Once the front door is closed, turn on the power and resume your TT8900 OPT activity.
Figure 26: T20 IIM Module Replacement