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12
Check Point
12-1.TCC-LINK wiring
No.
1
Check that the wiring is connected to the TCC-LINK terminal block on the Central remote controller.
Turn off switch DS1 on the Central remote controller termination resistor and confirm that resistance between U1/U3 and U2/U4
2
on the TCC-LINK terminal block is the termination resistance (about 100 Ω).
This confirmation makes it possible to determine that the wiring up to the system that set the terminal resistance is correct.
Check that a relay connector is connected between the U1U2 and U3U4 terminals on all centre units of the SMMS series of
3
outdoor units.
4
When custom device has been connected, check that the TCC-LINK adapter is connected to the base unit of the indoor unit.
12-2.End-to-end test
No.
1
Perform setting operations and display check separately on the controller and local remote control.
Before starting the check procedure, determine the order of the air conditioners to be checked and the check procedure with the
2
customer.
3
Check 1: Check that the unit name and operation status are identical on both the controller and the local remote control.
4
Check 2: Check that you can change local remote control settings using the controller.
5
Check 3: Restore the settings on the local remote control and check that the settings on the controller have changed.
6
Check the next air conditioner.
12-3.Method for identifying problem location when a C06
(reception errors of the TCC-LINK central control
device) occurs
No.
Check whether an E04 (communication circuit error between indoor and outdoor units) has occurred in the local remote controller.
(When E04)
1
(When not E04)
Check whether the C06 occurrence affects all air conditioners or only some of them.
(When some of the air conditioners are
affected)
2
(For all air conditioners)
22
Points to check
Points to check
Points to check
Error message
• Problem location: TCC-LINK wiring
• Action: Check connections by outdoor system unit to identify the
problem location (outdoor system).
• Problem location: TCC-LINK wiring between outdoor unit and
controller
• Action: Check the following items.
Error message
• Problem location: TCC-LINK wiring on the air conditioner side
• Action: Use C06 problem location and wiring working diagram to
identify the problem location to check wiring connection status
and perform continuity check of communication wiring.
• Problem location: TCC-LINK wiring on the controller side
• Action: Check the continuity of the communication wiring.
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