Danfoss GLT80TDC Manuel utilisateur

Danfoss Light Commercial

Refrigeration Compressors

GLT80TDC

Electronic driver connection manual, 12-42V, Direct Current - R134a

Installation guide

lightcommercialrefrigeration.danfoss.com

Content

Wiring and Connections ...................................................................................................... 4

Setting up the speed............................................................................................................ 6

Operating voltage................................................................................................................ 7

Battery protection system .................................................................................................. 8

Protections and alarms........................................................................................................ 9

3FRCC.PI.044.A1.02

Wiring and Connections

GLT80TDC must always be powered through

the dedicated electronic driver FDC3, which

is supplied with the compressor as a separate

device.

NEVER CONNECT THE COMPRESSOR’S HERMETIC

PINS (FUSITE) TO THE TERMINALS OF A BATTERY

OR ANY OTHER DC OR AC SOURCE DIRECTLY.

DO NOT TRY TO FIT AN ELECTRONIC DRIVER

OTHER THAN THE FDC3. THE COMPRESSOR WILL

NOT OPERATE AND IRREVERSIBLE DAMAGE MAY

OCCUR.

The FDC3 driver is directly connected to the

battery poles as well as to the compressor pins.

It checks battery voltage and adjusts itself to the

voltage value for proper compressor operation,

or switches itself o if the battery voltage is not

adequate. The driver also controls the compressor

speed.

ALWAYS RESPECT THE POLARITY OF THE BATTERY

WITH THE POWER INPUT TERMINALS OF THE

ELECTRONIC DRIVER.

The unit is protected against damage caused by

wrong polarity of the supply. The compressor will

not run correctly if it’s wrongly connected.

THE POWER INPUT TERMINAL “-“OF THE

ELECTRONIC DRIVER SHOULD BE REFERRED TO

THE CHASSIS OF THE VEHICLE AS WELL AS THE

APPLIANCE FRAME*

A FUSE MUST BE PLACED BETWEEN THE “+”POLE

OF THE BATTERY OR DC POWER SUPPLY, AND THE

“+” POWER INPUT TERMINAL OF THE ELECTRONIC

DRIVER

12V SYSTEMS: 30A FUSE

24V SYSTEMS: 30A FUSE

42V SYSTEMS: 20A FUSE

In some special vehicles, the chassis is connected

to“+”terminal of the battery instead of “-“

terminal (positive reference systems). In such

cases,“+”should be understood as“-“ and

vice-versa.

In systems powered by a variable DC source, the

fuse should be selected following the rules above

mentioned, considering the maximum voltage at

the variable DC Source.

To avoid excessive voltage drop in the leads, their

length and cross section must be related to the

voltage supply, as indicated in Table 1.

If any kind of connector or switch is placed

between the battery poles and the power

terminals of the electronic driver, its resistance

should be less than 10mΩ. If the resistance is

higher than 5mΩ, the maximum length of the

wires indicated in Table 1 should be halved or the

cross section should be doubled.

In case of using a long cable to connect battery

and electronic driver, it is recommended using a

cable with low inductance.

General rules

Voltage drop in the

power leads

Cross section mm2Rated Operating Range

12 - 14 V 24 - 28 V 36 - 42 V

4 2.5 2.5 3

6 4 4 6

10 6 6 9

Table 1: Maximum length

of leads (m)

4FRCC.PI.044.A1.02

Wiring and Connections

The FDC3 electronic driver features a terminal

board where all connections are made. The

terminal layout is described in Fig. 1:

Wiring Diagram

SPI

ELECTRONIC INTEGRAL MANAGER

CONTROL PANEL

THERMOSTAT

ELECTROMECHANICAL

OR ELECTRONIC

FAN 12V

BATTERY

FUSE FDC3

ELECTRONICAL DRIVER

24÷42V

ALARM SWITCHER

Fig 1. FDC3 wiring

scheme

NO RESISTOR IS NEEDED TO BE INSTALLED IN

FDC3 ELECTRONIC DRIVER

When connecting the electronic driver to the

compressor, any position of the connector

is possible under an electrical point of view.

However, in practice, the vertical position is not

possible because the electronic box cannot be

assembled. The connector should be connected

as shown below:

Fig 2. Connection of the

FDC3 electronic driver to

the compressor

5FRCC.PI.044.A1.02

Setting up the speed

The electronic control unit FDC3 is supplied

with the exclusive Serial Port Interface (SPI),

featuring a RJ45 telephone type connector. This

port is congured to set up the compressor

speed through physical connections between

their terminals. To facilitate this procedure, three

connector cables are supplied together with the

electronic driver. The compressor will run at a

certain speed depending on the used connector,

as shown in Table 2:

Furthermore, if a FDC programming kit is

available, the new FDC3 electronic driver can

be set up by programming it using the kit and a

computer.

NEVER USE FDC3 ELECTRONIC DRIVER IN OTHER

DC COMPRESSOR DIFFERENT THAN GLT80TDC.

If the compressor or the FDC3 electronic driver

should be replaced for servicing a refrigerator or

a freezer, one of the next procedures should be

followed.

1. If a FDC programming kit is available, use it

to check the setting of the old FDC3 electronic

driver and set up the new one by programming

the same parameters.

2. Otherwise, check the old FDC3 electronic driver

for the presence of a connector at the SPI to set

up the speed. If so, take it away and connect it

again at the new FDC3 electronic driver.

3. Otherwise check the appliance for some

information about compressor speed set up. If

so, select the proper connector which gives the

nearest speed set up from table 2.

1. Check for compressor displacement D0and

Speed S0. Then calculate the required velocity of

GLT80TDC as follows:

S = D0· S0/ 3 (D0in cm3)

and set up GLT80TDC speed by programming (if

FDC programming kit is available) or by selecting

a proper connector according to Table 2.

Table 2. Compressor

speed for each connector

Replacing a GLT80TDC

compressor or FDC3

electronic driver

Replacing a dierent

brand DC compressor

Connector Speed

NONE 2000

BLACK 2500

BLUE 3000

RED 3500

6FRCC.PI.044.A1.02

Operating voltage

GLT80TDC is designed to operate in a wide range

of DC voltages, supplied either by a battery or by

any other kind of ltered DC power supply.

DC VOLTAGE SUPPLY ALLOWED is 10V to 42.4V

If the battery voltage is below 17V, the controller

will assume that are working in a system of 12-

14V; if the voltage is greater than 17V and less

than 33V, assume that are working in a system

of 24-28V and if the voltage is greater than 33V

assume that are working in a system of 36-42V.

The output power is 450W (Nominal) 500W

(Maximum). 12-14V systems the output power

is limited to 250W. In any case, the minimum

operating voltage is 9V and maximum of 46.2 V,

admitting, once initiated the launch, a minimum

voltage of 8V during the rst minute.

From the value of the applied voltage, the

electronic driver automatically decides the rated

voltage range of the supply. Three possible

ranges are considered:

12 to 14V: voltage is below 17V

24 to 28V: voltage is within 17 and 33V

36 to 42V: voltage is within 33 and 42.4V

7FRCC.PI.044.A1.02

There is a protection system for the battery

that prevents the compressor from operating if

the available voltage becomes too low. Battery

protection level is set up for working under

normal circumstances in most appliances. Cut-

out and cut-in values are:

12V system: cut-out = 10.0V; cut-in = 11.5 V

24V system: cut-out = 22.0V; cut-in = 24.5V

42V system: cut-out = 36.0V; cut-in = 38.5 V

Other values can be set up if a FDC programming

kit is available.

Battery protection system

8FRCC.PI.044.A1.02

Protections and alarms

GLT80TDC is electronically protected against a

number of possible dysfunctions and failures:

• Battery discharge.

• Fan over current: protects the compressor and

the electronic driver against fan over current

due to start or running overload, or short-circuit.

• Starting failure: if the running speed is not

achieved during the starting sequence, the unit

stops and retries the start up after one minute.

• Compressor overload: it operates when

the compressor speed drops below the set

up speed, or when the current drawn in is

excessive, and thus preventing the appliance

from operating under overload conditions that

may cause otherwise refrigeration overload or

compressor failure.

• Electronic driver overheat: if the temperature

of the electronic components of the control

becomes too high, an internal sensor will stop

the unit.

In case of overheating, one automatic attempt

to restart the compressor is allowed. In case of

battery protection, there is no limit of automatic

attempts to restart. In case of any other

protection occurring, there will be two automatic

attempts to re-start the compressor.

Once the sequence of automatic attempts to

restart the compressor is nished, the unit will

remain permanently unable to operate until

switched o and on again from the power

supply. The intervention of the thermostat during

the sequence of automatic restart attempts

interrupts and resets the sequence.

9FRCC.PI.044.A1.02

Danfoss Commercial Compressors

is a worldwide manufacturer of compressors and condensing units for refrigeration and HVAC applications. With a wide range

of high quality and innovative products we help your company to find the best possible energy efficient solution that respects

the environment and reduces total life cycle costs.

We have 40 years of experience within the development of hermetic compressors which has brought us amongst the global

leaders in our business, and positioned us as distinct variable speed technology specialists. Today we operate from engineering

and manufacturing facilities spanning across three continents.

FRCC.PI.044.A1.02 - Danfoss Light Commercial Refrigeration Compressors made by Huayi © Danfoss | DCS (CC) | 2016.03

Our products can be found in a variety of applications such as rooftops, chillers, residential air conditioners,

heatpumps, coldrooms, supermarkets, milk tank cooling and industrial cooling processes.

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