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Mini VRF SYSTEM
Trouble Diagnosis
3. Mini VRF System Alarm Codes
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4. Mini VRF System Alarm Codes
Mini VRF SYSTEM
Trouble Diagnosis
E07 Error in Outdoor Unit Transmitting Signal to the Indoor Unit
Error Detection Method
Error Diagnosis
It is judged an error when a unit itself cannot receive (discrepancy) a signal within a 3-minute period that it had sent.
Outdoor main PC board error
The setting of the terminal resistor select switch on the outdoor main PC board is set incorrectly.
•
•
For information on the procedures for replacing the outdoor main PC board, refer to the manual that is packaged with the
service board.
•
1.
2.
Is the terminal resistor select switch on the outdoor main PC board
set to OPEN?
Is the indoor/outdoor operation line opened or shorted?
1-3
1-4
Replace the outdoor unit main PC board.1-5
Is the indoor/outdoor operation line connected to more than one
outdoor unit? (Network wired?)
1-1
Is the SHORT on the terminal resistor switch on the outdoor main
PC board set to one unit, and the others are OPEN?
1-2
Make the SHORT
setting
1-4
Yes
No
1-2
1-3
Yes
No
1-4
Set the SHORT to
one unit only
Yes
No
1 Outdoor
unit
control
PC board
Correct the wiring
1-5
Yes
No
(for single-phase outdoor unit PC board) (for 3-phase outdoor unit PC board)
TERMINAL TERMINAL
SM830195-04_Mini VRF SYS.indb 16 15/02/16 18:01:28
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