Toshiba MMU-AP0091H Procedure and Summary of Test Operation, Check Items before Test Operation

8. TEST OPERATION

8-1. Procedure and Summary of Test Operation

A test operation is executed in the following procedure. When a trouble or an error occurs in each step, remove causes of a trouble or an error referring to the section “9. Troubleshooting”.

2. In case that a central control system is connected (Before address setup)

Check before test operation

Check the main power supply

is turned on.

Set up the addresses.

Check the basic items, mainly the installation work.

Be sure to enter the check results in the check list 1 and 2.

It is the check after the power has been turned on. Check the refrigerant circuit system is normally turned on.

Start the address setup in the outdoor/indoor units.

(NOTE) The operation does not start by only power-ON.

Central control units
U1 U2			4
U3 U4				2
Other refrigerant line			Header unit (A)
U3 U4			U3 U4
		Outdoor unit
U1 U2	U5 U6	1	U1 U2	U5 U6
			Earth

5		3	Other refrigerant line
Follower unit (B)			Follower unit (C)
	U3 U4			U3 U4
U1 U2	U5 U6		U1 U2	U5 U6

Test operation

Carry out a test operation.

Check air blowing and cooling/heating operation in the indoor unit.

To indoor unit

3-phase
380-415V
Leak interception	6
6

END

Main switch

8-2. Check Items before Test Operation

Prior to the test operation, check the following items so that there is no trouble in the installation work.

U1 U2

Indoor unit

A B

U1 U2

A B

U1	U2			U1	U2
		A	B			A	B

86

Main check items for electric wiring

The communication system differs from
that of R22 or R407 refrigerant	Header unit (A)
“Modular Multi system”
	1	U3	U4
air conditioner.
	Outdoor
	unit

2

4

			3
Follower unit (B)			Follower unit (C)
	U3	U4		U3	U4

1-phase 230V Leak interception

Main switch Remote controller

Remote controller

Remote controller

Check again cautious points on wiring.

U1 U2

U5 U6

U1 U2 U5 U6 U1 U2 U5 U6

No. Main check items Check

1. In case that a center control	Earth
system is not connected:

•	Are indoor and outdoor communication lines of the header unit connected to U1/U2
	terminals?
‚	Is the relay connector between U1/U2 terminal and U3/U4 terminal removed?

3-phase

380-415V

Leak interception

Main switch

U1 U2

Indoor unit

A B

1-phase 230V Leak interception

Main switch

5

U1	U2			U1	U2
							B
		A	B			A

Remote controller

5

U1 U2

A B

	(Set up at shipment from the factory) (Before address setup, remove the relay connector.)
ƒ Is the communication line between outdoor and indoor units connected to U5/U6 terminal?
	Is the communication line of the central control system connected to the header unit U3/U4
„	terminals of each refrigerant line?
	(The communication line of the central control system may be connected to the communi-
	cation lines of the indoor/outdoor communication lines.)
	Is the terminal resistance (SW30-2) on the interface P.C. board of the header unit turned on?
…	(Set up at shipment from the factory)

No.	Main check items	Check
•	Are indoor and outdoor communication lines of the header unit connected to U1/U2
	terminals?
‚	Is the relay connector between U1/U2 terminal and U3/U4 terminal removed?
	(Set up at shipment from the factory)
ƒ	Is the communication line between each outdoor units connected to U5/U6 terminal?
„	Is the terminal resistance (SW30-2) on the interface P.C. board of the header unit
	turned on? (Set up at shipment from the factory)
…	Is the end terminal of the shield cable grounded?

Note) The above figure does not show all the electric cables.

For details, refer to the installation manuals for outdoor unit, indoor unit, remote controller, or optional devices.

(After address setup, turn off SW30-2 of the header unit except the smallest unit after

check of trial operation.)

† Is the end terminal of the shield cable grounded?

When the refrigerant line and the central control system of the custom air conditioner are

connected:

‡ → Are TCC-LINK adaptors correctly connected?

→ When the digital inverter air conditioner operates with group operation, twin, or triple

operation, are the adopters connected to the header unit of the indoor unit?

Note) The above figure does not show all the electric cables.

For details, refer to the installation manuals for outdoor unit, indoor unit, remote controller, or optional devices.