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Chapter 8 - Maintenance
8.8.4.26. CASE 26
PS1/PS2 relays are not operating or there is a bad connection in the wiring between RSI
and PS1/PS2.
The error codes above can be obtained from MCP Control Panel.
Figure 8.64
Problem:
(o) Power up sequence 1 not effective: OV on J105-7: relay PS1
not activated or faulty contact
(P) Power up sequence 2 not effective: OV on J105-8: relay PS2
not activated or faulty contact
Solution:
?
- Controller status
- I/O
-SystemIO
- Inputs
...
4 HPE2 = On
18 BUS_ON2 = On
Step 3: Feedback signals from PS1 and PS2
relays
(RSI error codes L, n)
Step 1: Command signals to enable power on
arm
(RSI error codes i, J)
- Outputs
0 HPE1_EN = On
1 HPE2_EN = On
...
Step 2: Enable power command applied to
PS1 and PS2 relays
(RSI error codes o, P)
5 HPE1 = On
17 BUS_ON1 = On
...