VALVE AS-CHECK 2W9209 - Caterpillar

Illustration 1 g00321237
Alarm Modules (1) Amber indicators. (2) Red indicators. (3) Lamp test switch. (4) Alarm silence switch. (5) Horn.The ALM is an attachment. The ALM is located on the instrument panel. Red indicators (2) and amber indicators (1) are the visual indicators. The Horn (5) is the audible indicator. A 24 DCV battery system or a 32 DCV battery system powers the ALM. The modules are either alarm modules or a remote annunciator. The versions are listed below.
Alarm Module
Remote AnnunciatorThe only difference between these modules is in the graphics film on the front of the panel and the jumper wires on the rear. The remote annunciator has a lamp test switch. The following description of operation refers to the alarm/remote annunciator module as the annunciator module. The alarm module (ALM) gives a warning of conditions that are becoming a problem. The warning occurs before conditions are severe enough to shut down the engine.An alarm fault develops while the generator set is running and when the engine control switch (ECS) is in the COOLDOWN/STOP position or in the AUTO position. An alarm fault develops when the generator set is not running and when the engine control switch (ECS) is in the COOLDOWN/STOP position or in the AUTO position. That fault is indicated by the optional alarm module or the remote annunciator. Description Of Operation
Note: In the following paragraphs, the annunciator can refer to the alarm module, or the annunciator can refer to the remote annunciator module. The annunciator receives data from the following items: switch inputs, internal circuitry and a serial data link from the GSC.Switch Inputs
Four switch inputs are available for the switch connections. Switch inputs that are connected to ground "B-" will be active. See Table 1.Internal Circuitry
Internal circuitry determines if the DC battery supply voltage is too low. The setpoint is set at the factory at 24 DCV. Data Link
The annunciator module receives data from the GSC by a serial data link. The received data includes the following list.
Coolant temperature has exceeded the high temperature alarm setpoint that is programmed into the GSC.
Oil pressure is below the low oil pressure alarm setpoint that is programmed into the GSC.
Coolant temperature is below the low temperature alarm setpoint that is programmed into the GSC.
The ECS is not in the AUTO or MAN/START position.
Oil pressure is below the low oil pressure shutdown setpoint that is programmed into the GSC.
Coolant temperature has exceeded the high water temperature shutdown setpoint that is programmed into the GSC.
The engine has failed to start.
The engine speed exceeded the engine overspeed setpoint that is programmed into the GSC.
The engine is shut down due to a coolant loss fault.
The engine is shut down due to a spare fault.
The engine is shut down due to an emergency stop fault.
The engine is shut down due to a diagnostic fault.The first eight items control the operation of the indicators and horn. See Table 1 for more information. The last four items control the operation of the horn only. A