80
8
System Operation
8.1.2
O2 Trim Modes
8.1.3
ES Mode (Set - Control)
Should the burner skip to ES mode while programming is in progress:
EV
indicates that although the mode selector switch is on SETTING it is nev-
ertheless performing the pre-purge routine. These is a signal on terminal
3.
If the selector switch is on SETTING and there is a ’signal on terminal 3’,
nevertheless the VMS maintains its control function. The setting mode
(display ’EI’) is only activated when the pre-purge is completed and there
is a flame signal and control release. Therefore the VMS can only be
programmed, when the signal combination corresponds either to the AU
and/or ’BE’ mode, or when the signal combination corresponds to the
AUTOMATIC mode.
ES
indicates that although the mode selector switch is on SETTING.
It's control function is working according to a calculated curve in the
RAM. The curve is calculated from a partial curve, which is already
entered. This mode is reached if the burner is switched off and is
restarted during a programming sequence. The programming can be
continued by operating a switch (change to ’EI’ mode). Flame signal and
control release are present.
ST
indicates that the VMS is set to FAULT. The fault code can be called up in
switch position STATUS. In the switch position FIRING RATE the firing-
rate at the time when the fault occurs, is displayed.
VO
indicates that the VMS is in PRE-PURGE mode. There is a signal on ter-
minal 2 and a signal on terminal 3. Pre-purge routine is active.
HAND
or
HA
indicates that the VMS has been switched to manual mode whilst the
burner is running. In the selector switch position FIRING RATE the
firing-rate can be adjusted by actuating the channel 1 switch. To quit
manual mode, actuate any switch but the channel 1 switch.
ext.Hand
indicates that the VMS was switched to manual operation, but the firing-
rate was specified externally and not via the channel 1 key (that is, e.g.
via remote software or bus).
LE
indicates that the output controller of the VMS is deactivated and the fir-
ing rate is controlled by an external signal
op
O
2
controller on standby (at startup burner), or O
2
controller temporarily switched off
as a function of firing rate via parameters 914 and 915.
or
O
2
controller active
ot
O
2
controller temporarily deactivated (air shortage, probe dynamics, etc)
od
O
2
controller deactivated (during fault) e.g. test routines failed during burner startup,
dynamic test negative, O
2
controller temporarily deactivated for longer than 1 hour,
etc.
Summary of Contents for VMS 4
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Page 119: ...118 10 Appendix...
Page 129: ...128 10 Appendix Fig 10 9 Ger t 4 Ger t 5 with output regulator...
Page 141: ...140 10 Appendix 10 14 Declaration of Conformity...
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Page 143: ...142 10 Appendix 10 15 Protocol Example...
Page 144: ...143 10 Appendix 10 16 O2 Setpoint Curves...
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