frequency (hertz) = CONTROL PANEL (TYPE 3) SYSTEMS OPERATION ACS Engine Control Switch Engine control switch (ACS) controls the engine start and stop systems.  To start the engine, move the switch to  the  manual  position.    To  stop  the  engine  move  the switch   to   the   STOP   or   OFF   position.      For   standby application  (engine  starts  when  remote  initiating  contact 1  closes),  move  the  switch  to  the  AUTO  position.    For more  information  on  the  operation  of  this  switch,  make reference to the AUTOMATIC START/STOP SYSTEM. ACV Alternating Current Voltmeter AC  voltmeter  (ACV)  shows  the  potential  differential (voltage)   between   phase   T1-T2,   T2-T3   or   T3-T1   at position  1,  2  or  3  respectively.    Make  reference  to  the ALTERNATING CURRENT AMMETER. DCA Direct Current Ammeter This  ammeter  shows  the  amount  of  DC  current  in amperes,    that    flows    in    the    alternator    circuit    (if    so equipped). ENFL/RE Engine Failure Light/Reset Switch Engine    failure    light/reset    switch    (ENFL/RE)    will activate when the engine has a failure.  One or more of the   shutdown   indicators   will   also   activate   to   give   an indication   of   the   problem.      Shutdown   relay   (SR)   will activate    to    start    the    shutdown    sequence.        Make reference     to     SHUTDOWN     CAUSED     BY     ENGINE FAILURE and ENGINE DOES NOT START. NOTICE Turn  engine  control  switch  (ACS)  to the STOP or OFF position immediately   after   engine   shutdown caused   by   high   water   temperature, low  oil  pressure  or  overspeed.    This will  cause  an  open  in  the  circuit  to the arming relay (AR).  Normally open contact   of   arming   relay   (AR2)   will open     and     current     flow     to     rack solenoid (RS) will stop.  This will help prevent  damage  to  the  rack  solenoid from too much current. FM Frequency Meter Frequency  meter  (FM)  shows  the  hertz  (cycles  per second) of the electricity made when the generator set is in   operation.      There   is   a   direct   relation   between   the frequency of the electricity and the rpm of the generator set: see formula. number of poles x rpm 120 GS Governor Switch Governor switch (GS) is in place of button   (2)  when the engine is equipped with a remote control synchronizing  motor  for  the  governor.    Engine  speed  is controlled with this switch. HS Heat Switch Heat  switch  (HS)  is  in  place  of  button  (1)  when  the engine is equipped with glow plugs.  This switch is used to operate the glow plugs for cold weather starting. OPG Oil Pressure Gauge Oil  pressure  gauge  (OPG)  shows  the  pressure.    in psi,   of   engine   lubrication   oil.      When   pressure   switch (PSW) is closed, oil pressure gauge (OPG) is connected across  battery  voltage.    There  is  a  relation  between  the current  flow  in  this  circuit  and  the  engine  oil  pressure read on oil pressure gauge (OPG).  Oil pressure sender (OP) controls the current flow by a change in resistance according to the change in engine oil pressure. PAM Prealarm Module Make reference to ATTACHMENTS. PL1,2 Panel Lamps Light  for  the  control  panel  is  given  by  panel  lamps (PL1  and  PL2).    These  lamps  are  controlled  by  panel light switch (PLS). 196