Table 3–11 FEU Error Codes
Error
Code
FEU
OK
FEU
Failure
Error Description
E200
Off
On
48V_SWITCHED OK before enabling
E201
Off
On
Fan converter operating before enabling
E202
Off
On
HVDC is OK, but POWER is not OK (contradictory
status)
E203
Off
On
The ac current is not OK (in idle state/loop)
E204
Off
On
48V_DIRECT is not OK and POWER is OK (IRQ18)
E205
Off
On
48V_SWITCHED is not OK and switched bus requested
(IRQ19)
E206
Off
On
HVDC is OK, but POWER is not OK (IRQ20)
E210
Off
On
SWITCHED BUS did not turn on at startup
E211
Off
On
SWITCHED BUS did not turn off at shutdown
E212
Off
On
The ac current is high for the second time (in startup or
run loop)
E220
Off
On
Fan converter voltage is low
Table 3–12 PSC Error Codes
Error
Code
PSC
OK
PSC
Failure
Error Description
EFFF
Off
On
Invalid error number (in display_error procedure)
E000
Off
On
Unused error condition
E001
Off
On
PSC bias supply not OK
E002
Off
On
80C196 internal register test failed
E003
Off
On
80C196 operational test failed
E004
Off
On
80C196 on-chip RAM test failed
E005
Off
On
ROM checksum test failed
E006
Off
On
External RAM test failed
E007
Off
On
Port FF20 (PSC/FEU LEDs) not initially zero
E008
Off
On
Port FF22 (Module enable) not initially zero
E009
Off
On
Port FF23 (DC-DC LEDs) not initially zero
E010
Off
On
Port FF24 (LDC enable) not initially zero
E011
Off
On
External interrupt test failed (8259 did not clear test bit)
E012
Off
On
Masked interrupt occurred (A/D conversion complete)
E013
Off
On
Masked interrupt occurred (HSI data available)
E014
Off
On
Masked interrupt occurred (HSO)
E015
Off
On
Masked interrupt occurred (HSI pin 0)
E016
Off
On
Masked interrupt occurred (Serial I/O)
E017
Off
On
Software trap interrupt occurred (F7 instruction
executed)
(continued on next page)
3–16 System Maintenance