Davies Craig LCD EWP/FAN DIGITAL Instructions Manual

LCD EWP/Fan Digital Controller Customer Instructions – Part #18922 (July17) Page 1 of 12

77 Taras Avenue

P.O. Box 363

Altona North

Vic 3025 Australia

Phone: [phone]

Fax: [phone]

[e-mail]

www.daviescraig.com.au

LCD EWP®/FAN DIGITAL CONTROLLER INSTRUCTIONS

(SUITABLE FOR USE WITH ALL DAVIES, CRAIG EWP®s (ELECTRIC WATER PUMP), EBP®s

(ELECTRIC BOOSTER PUMP), AND THERMATIC

®

FANS)

PLEASE READ ALL THESE INSTRUCTIONS THOROUGHLY BEFORE YOU START WORK.

DON’T RUSH - ENSURE YOU HAVE FULL UNDERSTANDING OF THE WORK AHEAD BEFORE YOU

COMMENCE. ENSURE YOU HAVE ALL TOOLS AND COMPONENTS REQUIRED.

Congratulations on your purchase of the Davies, Craig EWP®/Fan Digital
Controller (PATENTS: USA 6425353, EU 1133624, AUS 756453). This Controller will
manage the operation of your chosen EWP

®

or EBP® by varying the speed of
your pump in response to coolant temperature and it will manage the on/off
control of your Thermatic

®

Fan.

 The Controller will run the EWP

®

after ignition shutdown to dissipate

heat and avoid heat-soak.

 The Controller has a push-button control to allow you to choose one of

nine set operating temperatures.

 Generally, higher engine temperatures will offer improved fuel

efficiency and lower temperatures will increase power.

 It’s recommended that engine operational temperatures be checked

against those nominated by your vehicle manufacturer.

KIT CONTENTS:

Item

No.

Description Qty

1.

EWP Digital Controller

Assembly

1

2.

Wiring Harness

(Includes 10Amp Fuse)

1

3. Sensor Assembly 1

4. In-Line Adaptor 1

5.

Hose Clamps 2

6.

Ring Terminal 1

7. Rubber Sleeves 2

Not

Shown

Velcro 2

Not

Shown

Installation Instructions 1

Figure

1: LCD EWP/Fan Digital Controller Kit

Components.

Page 2 of 12

INSTALLING THE LCD EWP®/FAN DIGITAL CONTROLLER

1. The Controller should be installed inside the pas senger compartment to mini mise its

ambient temperature and exposures to water as the unit is not waterproof. Also
minimise exposure to direct sunli ght. Locate a hole in the firewall (approx. 20 mm in
diameter) and pass the wiring harness (including the sensor & pump “T-connector”)
through. If a hole of adequate size cannot be located, then wires may be cut then re­joined as a last resort. Connect T-Plug in wiring loom to the pump.

2. Connect black Sensor Plug to the thermal sensor located in the thermostat
housing/inline adaptor (Refer to Digital Controller Wiring diagram, Page 3).

3. Connect the white plug in the wiring harness to the controller then mount the
controller with Velcro supplied. Ensure it is mounted where access to the
temperature adjustment button is easy. NOTE: Ensure a good earth connection
using the self-tapping scr ew provided. The ear th lead must be connected to a metal
part of the car body.

4. Connect the Red wire fro m the wiring harne ss to the batt ery positive us ing the ring
terminal provided. Connect the Green wire from the wiring harness to an ignition
source (accessor y +12V/24V or switched 12V/24V), the wires may be spliced then
soldered if necessary. Ensure no wire is exposed, by insulating the join with
electrical tape.

5. Connect the Green and Black striped wire to the fan rela y if you w ish to c ontro l the
Thermatic® Fan 3º C above the set temperature. NOTE: The Co ntroller will ea rth the

fan relay, not power it.

6. Mount ‘Remote Test Light’ in a locatio n where it will be visible. The ‘T est Light’ may
be fitted by inserting it through a 4.6mm diameter drilled hole in a plastic area of the
interior/dashboard or simply with adhesive tape. T he ‘Remote Test Light’ has a two
pin connections. Heat shrink or insulation tape can be applied to these pin
connections once th e te st lig h t is mo unted. This will ens ur e the co nne c tio n po i n ts ar e
insulated and secure.

NOTE:

 In carrying out the wiring procedure, please bear in mind that it is adva ntageous

to minimise voltage drop by keeping the wiring as short as possible.

 Remove the engine the rmos tat from the thermo stat ho using and i nstall the se nso r

using Method 1 or 2 as shown below.

 If you often operate in very cold climates, drill 2 x 5mm holes in the thermostat

plate before reinstalling.

 Ensure there is no damage to the thermostat-housing gasket, and re-fit the

thermostat housing without the thermostat.

Page 3 of 12

OPERATION OF DIGITAL CONTROLLER

CONTROLLER ALGORITHM-PUMP OPERATION

The ‘set point’ can be programmed to any setting betw ee n 40°C (104°F) to 110°C
(230°F).

Figure 2: Digital Controller Wiring Diagram

Digital Controller Operation Chart.

Page 4 of 12

OPERATION of LCD

THEMPERATURE INDICATOR

Rises with increased engine temperature

EWP SYMBOL

FLASHING = EWP

®

operating in ‘pulsing’ mode – Refer Digital Controller Operations
Curve, areas &
ON = Electric Water Pump (EWP®) working at full speed.

FAN SYMBOL Circulating = fan operating
DIAGNOSTIC CHECK

System warning has been triggered. Therefore, refer to “Diagnostic Chart” in order to
determine possible cause, and take measures to correct the problem.

REMOTE TEST LIGHT (RED)
This light will “flash” when the system works in diagnostic check mode.

SYSTEM CHECK:

Every time the ignit ion is turned ON, all s ymbols will illum inate. This featur e allows you
to check all functions are operational.

SHUT DOWN MODE:

Your Controller will continue to operate your EWP® for three (3) minutes or until the
coolant temperature has reduce d -10°C/-14°F below your set point – whichever occurs
first. The “Shut Dow n” feature will eliminate heat so ak and reduce engine temperature
evenly. The feature protects your engine against gasket damage due to hot spots. This

Figure 2: LCD EWP

®

/Fan Digital Controller.

A

B

C