21578298 Volvo.Penta Engine heater

Control Panel (Status-Timing) Location Of Components
(1) Junction box. (2) Timing control module. (3) Emergency stop push button. (4) Engine status control module. (5) Engine control switch.
Inside Of Junction Box Door Location Of Components
(2) Timing control module. (3) Emergency stop push button. (4) Engine status control module. (5) Engine control switch. (6) Junction box door.The Control Panel (Status-Timing) contains the Timing Control Module (TCM), Engine Status Control Module (SCM), an Emergency Stop Push Button (ESPB) and an Engine Control Switch (ECS).The Engine Status Control Module (SCM) is used to monitor engine parameters (oil pressure, coolant temperature, engine overspeed and over cranking of the starter motor), provides an engine protection system (two stage shutdown) and controls normal start/stop functions.The Timing Control Module (TCM) monitors the engine for detonation through the two detonation sensors. If detonation is detected the timing is retarded. If the engine stays in detonation after the timing has been retarded, the TCM will shut down the engine. The TCM also controls timing based upon engine speed.An Emergency Stop Push Button (ESPB) is located on the control panel.When this button is pressed, the fuel is shut off and the engine ignition is turned off.
The Emergency Stop Push Button (ESPB) is not to be used for normal engine shutdown. To avoid possible engine damage, use the Engine Control Switch (ECS) for normal engine shutdown.
The Engine Control Switch (ECS) has four positions - "Off/Reset, Auto, Manual and Stop". For location and specifications on components located on the engine, make reference to the respective Engine Service Manual.
Components On The Back Of SCM (4)
(7) Fuses (F1 through F8). (8) Switch (overspeed verify). For point to point wiring diagrams and schematics, make reference to the Electrical Schematic, System D.C. Schematic.Function Of Controls
The Emergency Stop Push Button (ESPB) (3). When this button is pressed, the gas shutoff valve is de-energized which stops the fuel supply to the engine. At the same time a relay is energized to turn the ignition off (The magneto is not grounded, but the ground to the interface box from the timing control is opened).
The Emergency Stop Push Button (ESPB) is not to be used for normal engine shutdown. To avoid possible engine damage, use the Engine Control Switch (ECS) for normal engine shutdown.
To restart the engine, the emergency stop push button (ESPB) must be turned until it pops out. Below the emergencey stop is the Engine Control Switch (ECS) (5).The ECS determines the status of the control panel. In the automatic position (3 o'clock), the engine will start automatically whenever the remote initiating contact (IC) (line 47) (optional) is closed. The engine will also shut down after the initiate contacts open. An adjustable cooldown time can be programmed to give a 0 to 30 minute cooldown period before the engine shuts down. In the manual (run) position (6 o'clock), the engine will start and run as long as the ECS is in this position. In the stop position (9 o'clock), the fuel solenoid shuts the engine down after cooldown. In the off/reset position (12 o'clock), the fault lights are reset and engine shuts down immediately. The power will be removed from the SCM and TCM as soon as the engine is shutdown.Engine Status Control Module
The bottom of the control panel contains the Status Control Module. This displays fault conditions and key engine parameters.The Engine Status Control Module (SCM) accepts information from the operator, magnetic speed pickup (MPU) (line 21), oil pressure (OP) and water temperature (WT) transducer (line 49), and the timing control (line 18). This information is used to determine the "on/off" state of the engine's fuel and ignition system.
Engine Status Control Module (SCM)
(1) Display LCD. (2) Switch (display hold switch). (3) Overcrank LED. (4) Low oil pressure LED. (5) Overspeed LED. (6) Emergency stop LED. (7) High coolant temperature LED. (8) Auxiliary shutdown.In the very basic operating conditions, the SCM receives a signal to run the engine. The SCM then turns on the engine's fuel and starter. When the engine speed reaches the crank termination speed, the starter is disengaged. When the SCM receives a signal to stop the engine, it shuts the fuel off.The SCM has the following features:Cycle Crank - The SCM can be programmed to crank-rest-crank etc. for adjustable time periods (see Service Procedure A for adjusting).2301 Control - When the engine oil pressure increases past the low oil pressure setpoint, the SCM will indicate to a 2301 Woodward Governor that it should increase the engine speed from idle to rated.Cool Down - Upon receiving a signal to perform a normal shutdown, the SCM will wait a preprogrammed amount of time before shutting the engine off by means of the gas shutoff valve.Automatic Operation - While in the automatic mode, the SCM can be started by a remote initiate signal [when initiate contact (IC) (line 47) closes]. Upon loss of the signal, the SCM will perform a normal shutdown.Alarm Module Communication - The SCM can transmit fault and alarm conditions to an alarm module.Power Down - The Control Panel (Status-Timing) system is designed to remove power from the SCM and TCM when in the off/reset mode. The SCM will not allow the power down until the Crank Termination Relay and the Fuel Control Relay are both "off" (both relays turn off 2 seconds after zero RPM).Fuel Solenoid Type - The SCM can be programmed to work with either an Energize To Run (ETR) fuel system or an Energize To Shutdown (ETS) fuel system.LED Display - Six LEDs are located on front of the SCM to annunciate overcrank shutdown, overspeed shutdown, low oil pressure shutdown, high coolant temperature shutdown, emergency stop and auxiliary shutdown.Emergency Stop - If the SCM detects an emergency stop, the engine will shut down by means of ignition and fuel control. LED (6) will flash.Transducer Module Malfunction - If the signal from the engine mounted oil pressure/temperature transducer module is lost or unreadable, the engine will be shut down by means of the fuel control and a diagnostic code will be