Mitsubishi 20-MYA Specifications download pdf (Page 57)

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5. Before starting the trial run

Please execute the following confirmations to prevent wrong connection.

If there is wrong connection, it may damage fan controller, but also damage the unit.

Confirmation

Please intercept the power supply without fail, and secure safety when you execute detaching wiring, the connector,

and the measurement machine to the following work.

Step

Step 1

Confirmation matter Check Correspondence

Connected confirmation

Step 1-1 Is fan controller's power supply input wiring position connected correctly as

shown in installed manual?

Step 1-2 Is the phase of the connection of fan controller power supply input (TB IN)

accurate?

Step 1-3 Is the phase of the connection of fan controller output (TB OUT) accurate?

Step 1-4 Is the phase of connection of fan controller output wiring to fan motor accurate?

Step 2

Drive confirmation

Step 2-1 Does the fan rotate in a correct direction, when the unit is driven ?

Step 2-2 The thermistor for the condensing temperature detection is removed to CN01.

Drive to the cooling operation.

(The unit stops abnormally when the cooling operation drive is continued for a

long time occasionally. - High pressure switch off)

Whether LED01 has blinked is confirmed.

When the unit is in operation, the fan controller output voltage measured

in TB OUT, and checked whether the output of about 200V.

There is a problem when it is an output of about 300V.

Step 2-3 The thermistor for the condensing temperature detection is surely connected

with CN01 as before.

Step 2-4

Step 1-5 Is the thermistor for the condensing temperature detection of the attachment

connected with CN01?

Step 1-6 Is the thermistor for the condensing temperature detection accurately installed

in the unit?

Step 1-7 In case of the heat pump model, the wiring for full load input is connected with

CN04?

In case of the heat pump model and the heating drive is possible, the heating

drive is executed and the voltage of CN04 is input AC198V - 264V.

In that case, the fan must be full load drive.

(The output of the power-supply voltage is confirmed in TB OUT. )

When heating cannot be driven, step 1-7, step 1-8 is executed again.

In case of the heat pump model, the wiring for full load input is connected

accurately in control box?

Step 1-8

Troubleshooting 1,2

Troubleshooting 3

Troubleshooting 4

CN04

TB OUT

VW L1 L2 L3

CN01

Fan controller layout

Refer to Step 1-2

Refer to Step 1-5

Step 2-2

Step 2-3

Refer to Step 1-7

Step 2-4

U : Red

V : White

W : Black

L1 : Red

L2 : White

L3 : Black

Refer to Step 1-3

TB IN

1 2 ... 52 53 54 55 56 57 58 59 60 61 62

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Mitsubishi 20-MYA Specifications Page 57

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