TM-9-2350-277-10

CARRIER, M113A3, M577A3, M1059A3, M1064A3, M1068A3 AND M58

TECHNICAL MANUAL; OPERATOR’S MANUAL

TM-9-2350-277-10 - Page 184 of 889

TM 9-2350-277-10

DESCRIPTION AND USE OF OPERATOR’S CONTROLS AND INDICATORS — Continued

0004 00

Table 36. VARIABLE SPEED FAN CONTROLLER INDICATOR

KEY

CONTROL OR INDICATOR

FUNCTION

VARIABLE SPEED FAN

CONTROLLER

Allows you to determine if the variable speed fan is functioning

properly. Light position(s) determine area of fault(s).

— Status Codes

Identifies what the Variable Speed Fan Controller identifies as a

system fault that should be checked out to prevent damage to the

engine and/or Variable Speed Fan Drive (VSFD).

— Engine Running

Light is ON when the engine is running, OFF when the engine is

shutdown.

—UnitStatus

LightscomeONduringstartuptoindicatetheyareworkingand

then go OFF. During vehicle operation, the Fan Speed Sensor,

Temperature Sensor, Fan Controller, and Coolant Temperature are

monitored. If any one or a combination of the three fault codes

that are not used are displayed, disregard. Any other fault code(s)

displayed identify a problem(s) that may cause the vehicle to

breakdown. See Troubleshooting for corrective actions. When all

three indicator lights are OFF, the sytem is operating properly.

0004 00-45

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