RBU-27 General Issues

This table describes the outputs and their related relays.  In case there is a problem check the following before troubleshooting your unit:

• Voltage
• Circuit breakers
• All other connections

After verifying that the above are operating, follow the instructions given in the table below.

General Troubleshooting Issues

Issue #	Issue Description	Related Relay
1	Inlet open1 power fails	Replace K2
2	Inlet open2 fails	Replace K3
3	Tunnel open power fails	Replace K5
4	Fan 1 & 2 fails	Replace K16
5	Fan 3 & 4 fails	Replace K17
6	Fan 5 & 6 fails	Replace K18
7	Fan 7 & 8 fails	Replace K19
8	Fan 9 & 10 fails	Replace K20
9	Fan 11 & 12 fails	Replace K21
10	Fan 13 & 14 fails	Replace K22
11	Fan 15 & 16 fails	Replace K23
12	Heater 1 & 2 fails	Replace K24
13	Heater 3 & 4 fails	Replace K25
14	Cool Pad 1 & 2 fails	Replace K26
15	Cool Pad 3 & 4 fails	Replace K27