Danfoss 101N0720 Installation guide

1/1 Designed and manufactured by Secop for DANFOSS - DEHC.EI.101.A2.02 / 520N1012 August 2011

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With factory settings, the compressor will run with a ﬁ xed speed of 4,000 rpm when the thermostat is switched on. Other ﬁ xed compressor speeds and start speeds in the range between 2,500 and 4,000 rpm can be obtained when changing the speed settings in the software. A start delay in the range from 2-240 sec. (factory setting 4 sec.) after thermostat cut-in can also be chosen.

Fan (Fig. 1)

An evaporator fan (60W) (6) can be connected between the terminals + and Fe and a condenser fan (60W) (5) between + and Fc . Connect the plus to + and the minus to Fe or Fc. If both fans are used, the settings in the software must be adapted, including specifying the voltage used. The factory setting is no fans and 48V. The unit has to be restarted when these settings have been changed. If fans are used without adapting the software settings, the fans will run but no error signal will be sent in case of fan failure. It is also possible to set a start delay on the fans in the range from 0-240 sec. Factory settings for the evaporator fan is 6 sec. and for the condenser fan 0 sec. Fan speed can be adjusted through the interface from 40-100%.

Error handling

If the electronic unit records an operational error, the error can be read out in the software. Error codes are deﬁ ned as shown in Fig. 4.

The electronic unit is a single voltage device. This means that the unit can only be used with 48V DC power supply systems. Maximum voltage is 60V DC,

max. ambient temperature is 55°C. The electronic unit has a built-in thermal protection which is actuated and stops the compressor operation if the electronic unit temperature becomes too high (100°C / 212°F on the PCB). It can be connected to a PC through the Secop One Wire/LIN Gateway communication interface (9) on the terminals I , + and C. Communication gateway modules incl. communication cables (max. possible length: 3000 mm) can be ordered at Secop. The PC interface allows for making different settings and reading out several measurements by using the software tool TOOL4COOL® supplied by Secop (must be ordered separately).

Installation (Fig. 1)

Connect the terminal plug from the electronic unit to the compressor terminal (10). Mount the electronic unit on the compressor and ﬁ x it with the two screws (1).

Power supply (Fig. 1)

The electronic unit must always be connected directly to the battery poles (2). Connect the plus to + and the minus to -, otherwise the electronic unit will not work. The electronic unit is protected against reverse battery connection. For protection during installation, a fuse (3) must be mounted in the + cable as close to the battery as possible. The fuse rating shall be 20A maximum for 48V circuits.

If a main switch (4) is used, it should be rated to a current of min. 25A. The wire dimensions in Fig. 2 must be observed. Avoid extra junctions in the power supply system to prevent voltage drop from affecting the battery protection setting. Special supply cables can be ordered as accessory (Molex type 42816-0212).

Battery protection (Fig. 3)

The compressor is stopped and re-started again according to the chosen voltage limits measured on the + and - terminals of the electronic unit. The standard settings for the power supply systems are shown in Fig. 3. Other settings are set through the communication interface.

Thermostat (Fig. 1)

The thermostat is connected between the terminals C and T. Either a NTC (electrical thermostat) (8) or a mechanical thermostat can be connected (7). Three different thermostat modes can be chosen in the software – “Auto” (both NTC and mechanical), “NTC” or “Mechanical”. Standard setting is “Auto”. In case of using a NTC the set point in the range between -25º C and 40 º C is set with the software and the temperature can also be seen by using the interface. When using the “Auto” setting in the software it is not possible to obtain NTC failures, so it is recommended to set the thermostat mode to “NTC” when using a NTC.

Speed selection

Speed can be set through the Secop One Wire/ LIN Gateway communication interface (9).

ENGLISH

Instructions

Electronic Unit for BD350GH Compressor,

101N0720, 48V DC

Fig. 1

Wire Dimensions

Size Max. length*

24V operation

Cross

section

AWG

[mm2]

[Gauge]

[m] [ft.]

2 x 4 2 x 6

2 x 10

9 7

1.5 2 4

4.92

6.60

13.12

*Length between battery

and electronic unit

Fig. 2

Fig. 3

Battery protection settings

Voltage (0.1 steps) Min. value Default

Max. value

Cut out VDC 32 36 60

Cut in diff. VDC 0.5 4.0 10.0

Operational errors

Error code

Error type

Can be read out in the software TOOL4COOL®

Thermostat failure

(If the NTC thermistor is short-circuit or has no connection, the electronic unit will enter manual mode).

Thermal cut-out of electronic unit

(If the refrigeration system has been too heavi ly loaded, or if the ambient tem pe ra ture is high, the electronic unit will run too hot).

Minimum motor speed error

(If the refrigeration system is too heavily loaded, the motor cannot maintain minimum speed at approximately 1,850 rpm).

Motor start error

(The rotor is blocked or the differential pressure in the refrigeration system is too high.

Fan over-current cut-out

(The fan loads the electronic unit with more than 1.8A

peak

Battery protection cut-out

(The voltage is outside the cut-out setting).

Fig. 4

Flexible control settings

TOOL

COOL