Fischer Panda 15 mini PMS Digital, Руководство пользователя

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Generator control system
Based on VCS183
DS_VCS183 Page 12
Rev. 06 www.fischerpanda.com ©Fischer Panda generators Inc.
Failed actuator
With no control over the actuator the control system will be able to run the generator in emergency
mode only. Faulty actuator is reported on the panel. In such case and with request to immediately run
the generator the user needs to adjust the actuator to about 80% of total throttle and fix it in this
position by external means (zip-tie or wire). Now the generator may be started and with the control
system knowing it has no control over the actuator it will immediately transition into operational mode
warm-up. It will further never attempt to control engine speed with a faulty actuator. It is the
user’s
responsibility to keep adjusting the engine speed in a way that will keep the voltage between shutdown
limits or the control system will stop the generator because of output voltage outside specified limits.
Other functionality is not impacted in this mode of operation.
Reading the generator winding temperature
The sensor for generator winding temperature is physically placed inside the winding, thus surrounded
by conductors with high voltage. The entire concept of control system VCS183 is to keep AC and DC
voltages completely isolated - even in critical condition. Neutral output of the generator and battery
negative are joined (both connected to the engine frame) but this is outside the control system and
safety of the control system won’t rely
on it. For this reason, the coil temperature sensor has common
ground with the AC sensing input but is completely isolated from DC supply. Because of this and some
technical requirements the control system is not able to read coil temperatures less than 40°C. Thus, the
control system will consider the coil temperature to be in safe operating area if the generator is not
running and also if neither
“coolant in temperature”
nor
“cylinder head temperature” reads
above 80°C.
If none of these conditions are true and the control system is still not able to read coil temperature then
it will report the coil temperature sensor to be missing (MW11).
Reading all other temperature sensors
All remaining temperature sensors will be monitored continuously. The control system will detect any
shorted or not connected temperature sensor and will report this. As per ABYC requirements
temperature sensor on exhaust elbow is mandatory as well as
“
engine temperature
”
sensor.
Temperature sensors for “coolant in” and “cylinder head”
may both be considered engine temperature
sensors, thus if at least one of these two is in working condition then ABYC requirements are satisfied. If,
however none of these is working then this is considered missing a crucial sensor and an alarm message
will be triggered (ST12,
Table 7: Alarm messages ).
Any temperature sensor may be disabled; access to this level of settings is password-protected. If
disabled then the corresponding temperature will not be monitored; sensor status (reading or disabled
or broken) will be logged.
If exhaust elbow temperature sensor is disabled then temperature monitoring is obviously not available
but the control system will assume it is not supposed to report missing temperature sensor. Disabling
this sensor is not recommended unless the generator is required to run despite other safety
considerations.
If cylinder head temperature sensor and coolant inlet temperature sensor are both enabled then at least
one needs to report valid reading or the control system will detect a major fault since it has no way to
read engine temperature.