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9 Appendix
9 Appendix
9.1 Mode Abbreviations Used
Fig. 9-1 Status display at customer interface
Short text Description
BE → READY (signal on terminal 58)
ZÜ → IGNITION POSITION or IGNITION
EZ → SETTING/IGNITION position (same as IGNITION, but Gerät on SET-
TING)
GL → BASE FIRING RATE
EG → SETTING/BASE FIRING RATE” (as BASIC FIRING RATE, but Gerät
on SETTING)
NA → POST-PURGE
AU → BURNER OFF (no signal present)
EL → SETTING
SL → CLEAR MEMORY
EV → SETTING/PRE-PURGE" (as "PRE-PURGE", but Gerät on SETTING)
ES → SETTING/CONTROL (as AUTOMATIC but Gerät on SET)
ST → FAULT
VO → PRE-PURGE
HA
or Hand
→ MANUAL MODE (burner efficiency may be adjusted manually)
no display → Burner set to AUTOMATIC during OPERATION
LE → EXTERNAL FIRING RATE (firing rate controller disabled by digital
input)
op O
2
TRIM READY (with burner start-up) or O
2
TRIM via
P 914 and P 915 depending on firing rate, temporarily switched off
or O
2
TRIM ACTIVE
ot O
2
TRIM TEMPORARILY DEACTIVATED (air deficiency, probe
dynamic etc.)
od O
2
TRIM DEACTIVATED (in fault mode) e.g. testing routines with
burner start-up not successfully completed,
O
2
trim switched off temporarily for more than 1 hour
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