Manual
HM1016ER1
Control and Operation Instruction
Harsen
®
Page 12/54
NOTE:
When the controller is running in “MANUAL” mode, the Gen must be
normal, or the “C/O” button of Gen will be disabled.
GCB and MCB close/open relays are electrically interlocked, they can’t be
closed at the same time.
Generator stopping sequence:
Press “STOP” button, GCB close/open relay opens, the generator is without load, the cool down timer
starts, when it times out, the fuel relay is de-energised, then the fuel solenoid opens immediately,
generator stops and goes to standby status.
If press “STOP” button again during cool down period, generator stops immediately without cool down time.
4.4 TEST Control Sequence:
When the Controller is running in “TEST” mode means it simulates Mains failure automatically. There are
two kinds of “TEST” modes, one is “Test with load”, another is “Test without load”, and they can be
selected through parameter setting.
Test with load: GCB close/open relay will be closed after the generator is started successfully and
running normally, then Gen will be on load.
Test without load: GCB close/open relay will not be closed after the generator is started successfully and
running normally, the Mains remain on load.
4.5 The start and stop Sequence of engine whose fuel solenoid is N. O. type:
There are two kinds of fuel solenoids for an engine, one is N.C. type, the valve of this solenoid is closed
when the engine is in standby and it can be opened by switching on power; another is N.O. type, the
valve of this solenoid is opened when engine is in standby and it can be closed by switching on power. All
control sequences above are for N.C. type.
Start control sequence for N.O. type:
During the starting sequence the fuel relay of controller will not energise, fuel solenoid is off power, fuel
solenoid is normally open so no signal required for fuel solenoid to activate.
Stop control sequence for N.O. type:
During the controller’s stop sequence, the fuel relay energises, fuel solenoid is on power, the fuel solenoid
closes the fuel valve and the engine begins to stop. After a delay (same as Stop delay) fuel relay de-
energises, disconnecting the supply from the fuel solenoid.
Other control sequences are same as engine whose fuel solenoid is N. C. type.
