Lull 944E-42 Service Manual User Manual download pdf (Page 716)

100

101

Electrical System

9.206

Model 644E-42/944E-42 Rev. 6/04

9.13.11 Cab Heater/Air Conditioning Controls

Note: If the suspect component is found to be within the

heater box, the heater box must be removed as a

complete unit and replaced. Refer to Section 4.4.8,

“Heater/Defroster System.”

The cab heater and air conditioning

controls (1) are located in the lower bank of

switches on the right side of the dash. From left

to right the control panel consists of: a variable

speed fan control (2), an A/C on-off switch (3)

and a temperature control (4).

Control of air flow is made by opening, closing

or redirecting the air vent louvers in separate

locations inside the cab. For instance, if the

front glass needs rapid defrosting, redirect the

air flow at the front vents (directing the vent

louvers toward the glass) and close the remaining vents.

This will increase the volume of air flow to the front glass

and speed defrosting.

a. To heat the cab:

• turn A/C switch (5) to the OFF position,

• turn temperature control knob (6) to far right

position (RED = HOT),

• direct desired air flow by adjusting vent

louvers,

• turn fan control (7) to position “3” (8) to

assure rapid warm-up.

b. To defrost the cab:

• turn temperature control knob (7) to the

far right position (RED = HOT),

• direct desired air flow by adjusting vent

louvers,

• turn fan control (5) to position “3” (8) to

assure rapid defrost.

c. To cool the cab:

• turn A/C switch (6) to the ON position,

• turn temperature control knob (7) to the far

left position (BLUE = COOL),

• direct desired air flow by adjusting vent

louvers,

• turn fan control (5) to position “3” (8) to

assure rapid cool-down.

MU3480

OS1950

OS1960

OS1950

OA1390

OS1960

OU0930

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