Danfoss 105N4210, 105N4212 Installation guide

Instructions

Electronic Unit Type 105N4210 & 105N4212,

80-140V, 50-60Hz for NLV Compressors

8238-17

ENGLISH

The electronic unit is working in an AC voltage range of 80-140V. Max. allowable ambient temperature is 43°C. The electronic unit is provided with a built-in thermal protection which stops the compressor in case of thermal overload.

1. Installation

The connector (11) of the electronic unit (9) has to be connected to the compressor (12) first. The total unit then is assembled by putting on the housing. Furthermore, screws with toothed washers must be mounted to the compressor through the recesses in the heatsink unit (6). All other terminals (except the earth connection under point 6) and cord relief (8) are under the cover (7).

2.Power supply

Power supply L and N:

Power supply (1) is connected to L and N. Earth connection is connected to terminal on the compressor housing (12).

3.Fan

Fan N and C:

A fan (2) can be connected to N and C. It will be operated with power line voltage, and cut in and out with the compressor if a conventional thermostat is used.

4. Thermostat connection (3) light connection (4) The unit has 3 connection options for thermostats.

4.1 Voltage signal application "on - off" (conventional thermostat)

Thermostats C, L and N:

Compressor control is an "adaptive control", see description under point 5.

4.2 Application of a thermostat provided with DC signal out (min. 5V, max. 15V)

Signal input R+ and R- (5) (fan connection not possible):

Connection with DC signal "on - off" to control unit, with reinforced isolation in control unit (5).

The compressor unit runs in "adaptive control" mode, see description under point 5.

4.3 Application of an electronic thermostat with frequency output (min. 5V, max. 15V)

Signal input R+ and R- (5) (fan connection not possible):

The refrigerator thermostat has to supply the control unit (9) with a square signal (min. pulse width 200 µs). The input terminals are reinforced isolated. If the frequency is more than 100 Hz the compressor goes into "external reference control" mode. The compressor speed is controlled by the external frequency ("adaptive control" is disabled). The control unit remains in this mode until the power supply is disconnected. The compressor stops with an input signal below 198 Hz (min. 196 Hz, max. 199 Hz). Compressor operation: if a frequency of above 203 Hz (min. 201 Hz, max. 205 Hz) is supplied, the compressor starts. Example for compressor speed: external frequency multiplied by

10 (270 Hz => 2,700 rpm). If a signal with a frequency according to a speed above maximum is applied, the compressor works at maximum speed.

12

9

6

6

10

8385-9

7

8 8

7

1

	M	2
	L
11	N	3
	N
	C
	C	4
	L
	N

R+

R-

If a DC signal is supplied immediately after a frequency signal, the compressor speed is locked until another frequency is applied or the DC signal is removed.

5. Adaptive control

(AEO - Adaptive Energy Optimizer)

The compressor adjusts its speed in steps to any increasing or decreasing cooling demand, within the minimum and maximum speed limits. If the thermostat switches the compressor "ON": After a 60-minute running time, the speed will increase stepwise every 15 minutes, depending on the latest speed used, until

f 5

the maximum is reached. If the thermostat switches the compressor "OFF": After each "ON", the compressor either restarts with lower speed steps than the recently used, until the minimum is reached, or increases its speed stepwise, after a new 60-minute running time.

6. Earth connection

Earth connector to be applied to compressor housing

(10). The electronic unit is protected by the electrical connection heatsink - toothed washer - screw - compressor housing.

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1/2 DEHC.PI.300.A1.22/520N0420 01-2007

Instructions

Electronic Unit Type 105N4210 & 105N4212,

80-140V, 50-60Hz for NLV Compressors

8238-17

ENGLISH

7. Troubleshooting

To diagnose why the compressor comes to an unintended stop, it is recommend to have a Light Emitting Diode (LED) on the PCB board.

Provided that the electronic unit is properly connec-ted to the power supply, the number of flashes emitted by the LED will give a hint about the reason for the interruption of the compressor operation.

The motor windings can be checked for defects by measuring the resistance between the current lead-in pins. If the measured values between all 3 pins are approximately the same, the motor is most likely all right.

The electronic unit is not to be repaired. It should not be opened at all.

Number	Error type
of
flashes

1	Under voltage
	(The supply voltage is below 80V AC).
2	Over speed
	(The compressor speed was above 7100 RPM).
3	Under speed
	(If the refrigeration system is too heavily loaded,
	the motor can’t maintain min. speed at approxi-
	mately 1850 RPM).
4	Thermal cut-out
	(If the refrigeration system has been too heavily
	loaded, or the ambient temperature is too high).
5	Start error
	(More than 5 start attempts).

Screw 3.5x12 mm

Mounting	Compressor
recesses

Electronic unit

Earth connection

	Screw 3.5x25 mm	Cord relief	8385-5
			Screw 3.5x12 mm

Cover

Connector

	Power supply
		Fan
	M	connect.
	Thermostat
L	connect.
N
N
C		Light
C
L		connect.
N
R+	f Signal input
R-

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2/2 DEHC.PI.300.A1.22/520N0420 01-2007