Ford Ranger EV. Electric Manual - part 10

LESSON 1: VEHICLE OVERVIEW

1-37

CLIMATE CONTROL SYSTEM

Heating System Description

ER026-A

HIGH VOLTAGE COMPONENT

A

B

Heating System

•

In place of using engine coolant to heat the passenger

compartment, the Electric Ranger uses a positive temperature

coefficient (PTC) heater.

•

A PTC switching module (A) provides high voltage to the

PTC heater.

•

The PTC switching  module is located in the underhood

compartment in front of the high voltage power distribution

box (B).

•

The module is controlled by the IAA, and provides fault feedback

to the IAA, if any of the following faults occur:

– A short in the PTC switching module

– A heater core over-temperature condition

– A heater core fault

•

Feedback is provided on heater core fault conditions (open, short,

or over current).

LESSON 1: VEHICLE OVERVIEW

1-38

Heating System Operation

Heater Assembly

•

The PTC heater is an electric resistance heater with a two-stage

heater core that operates on two separate circuits.

•

The heater core uses high voltage DC from the traction battery to

defrost the windshield and heat the passenger compartment.

•

The heater core is housed in the heater plenum under the

instrument panel.

– The plenum is modified from the gasoline-powered

Ranger assembly.

– The vacuum system, blend door actuator, fresh/recirculation

solenoid, over-temperature switch, and wiring harness are new,

and the seals are modified.

– The evaporator assembly is a modified gasoline-powered

Ranger assembly.

– The blower motor and serviceable air filter are new (the air filter

is replaced annually). Air filter is located inside the blower

motor housing.

LESSON 1: VEHICLE OVERVIEW

1-39

•

The manual control head is a modified gasoline-powered Ranger

design with a:

– mode switch.

– blower switch.

– temperature potentiometer.

•

A new recirculation switch allows heat to be recirculated.

•

The ambient and in-vehicle temperature sensors are carryover from

Explorer.

•

Heating temperature in the passenger compartment is limited to

27°C (80°F) to conserve traction battery power.

LESSON 1: VEHICLE OVERVIEW

1-40

Air Conditioning System

ER028-A

B

A

HIGH VOLTAGE COMPONENTS

Air Conditioning System Components

•

The air conditioning compressor (B) is located in the lower center

of the under hood compartment.

•

The absence of an internal combustion engine means there is no

drive belt to power a pulley-driven compressor.

•

The Electric Ranger uses an AC high voltage variable-speed

compressor.

– The AC high voltage is supplied by the A/C inverter motor

controller (A).

– The A/C inverter motor controller has a case similar to the

design of the DC/DC converter and is located next to the battery

charger.

– The controller contains three IGBTs for high speed current

switching.