Carrier ASPAS1CCA007 2.7PROTECTION SYSTEMS, 3.1FUSES, ‹2.7.3 OVER CRANK, ‹2.7.4 OVER SPEED

Section 2 — Operation

Carrier Air-cooled 7 kW, 12 kW and 15 kW Generators

NOTE:

The exerciser will only work in the AUTO mode and will not work unless this procedure is performed. The exerciser will need to be reset every time the 12-volt battery is disconnected and then reconnected.

The exerciser WILL NOT work if dip switch 2 on

!the controller printed circuit board (Remote Not Auto) is ON.

NOTE:

‹2.7.3 OVER CRANK

This feature prevents the generator from damaging itself when it continually attempts to start and another problem, such as no fuel supply, prevents it from starting. The unit will crank and rest for a preset time limit. Then, it will stop cranking, and the Over Crank LED on the generator control panel will light indicating an over crank failure. The AUTO/OFF/MANUAL switch will need to be set to OFF and then back to AUTO to reset the generator control board.

NOTE:

Damage will result if battery connections are made in reverse.

If the fault is not repaired, the over crank feature will continue to activate.

2.7PROTECTION SYSTEMS

‹2.7.1 LOW OIL PRESSURE SWITCH

This switch (Figure 2.3) has normally closed contacts that are held open by engine oil pressure during cranking and operating. Should oil pressure drop below the 8 psi limit, switch contacts close, and the engine shuts down. The Low Oil LED will light. The unit should not be restarted until oil is added. The AUTO/OFF/MANUAL switch must then be turned to OFF and then back to AUTO to reset.

‹2.7.2 HIGH TEMPERATURE SWITCH

This switch’s contacts (Figure 2.3) close if the temperature should exceed approximately 140º C (284º F), initiating an engine shutdown. The High Temp. LED will light. The generator will automatically restart and the LED on the generator control panel will reset once the temperature has returned to a safe operating level.

Figure 2.3 – Low Oil Pressure and

High Temperature Switches

Low Oil Switch High Temp Switch

Loosen

Oil

Drain

Hose

Oil Filter

2.7.3.1 Approximate Crank Cycle Times

•15 seconds ON

•7 seconds OFF

•7 seconds ON

•7 seconds OFF

•Repeat for 45 seconds Approximately 90 seconds total

‹2.7.4 OVER SPEED

This feature protects the generator from damage by shutting it down if it happens to run faster than the preset limit. This protection also prevents the generator from supplying an output that could potentially damage

appliances connected to the generator circuit. If this protective shutdown should occur the Over Speed LED will light. Contact the nearest Carrier Dealer if this failure occurs.

3.1FUSES

The generator panel's 15-amp fuse (Figure 2.1) protects the DC control circuit and the battery charge circuit against overload. This fuse is wired in series with the battery output lead to the panel. If this fuse element has melted open, the engine will not be able to crank or start. The generator will also lose all battery charge capabilities. Replace this fuse using only an identical 15- amp replacement fuse. To replace the fuse, push the fuse holder cap down and rotate it counterclockwise.

The generator panel's 7.5-amp fuse protects the 12 VDC accessory socket. If the fuse element has melted open, the 12 VDC socket will not be able to provide power to any accessories. Replace this fuse using only an identical 7.5-amp replacement fuse. To replace the fuse, push the fuse holder cap down and rotate it counterclockwise.

12 Carrier