Toshiba HFC R407C Service Manual page 27

1. Communication serial signals and the system operating status are displayed by changing display
switch SW2.
Display Display Indication
switch switch
SW1 SW2
position position
0 0 Sending/receiving status of
interface control board serial
signal
1 Operating instruction
from M/C (1)
2
3 Outdoor unit
operating condition
4
5 Operating instruction
from M/C (2)
6
9 Inverter operation status
10 Operating instruction to
inverter from interface
control board
11 Power supply frequency
Diagnostic procedure
Outdoor unit
Operating
mode
Instruction
frequency
Operating
mode
Operating
mode
Instruction
frequency
7-segment LED display
LD 71 LD 72
Between Between
M/C (1) M/C (2)
Sending Not sending
only [S] or receiving
[ ]
Receiving Sending and
only [J] receiving [0]
Heating [H], Simultaneous
cooling/heating [HC],
Cooling [C], Stop [ ]
Heating frequency [00-1F]
(Refer to conversion table 2)
Heating [H], Cooling [0C],
Simultaneous heating [Hc]
Defrost [J0], Simultaneous
cooling [hC]
M/C Frequency
operation release
Off: [0] No: [0]
1 unit: [1] Yes: [1]
2 unit: [2]
Heating [H], Simultaneous
cooling/heating [HC],
Cooling [C], Stop [-]
Heating frequency [00-1F]
(Refer to conversion table 2)
Normal Operating
[C] frequency
[0-F],
Abnormal (Refer to
[E] table 3)
Normal Operating
[C] frequency
[0-F],
Abnormal (Refer to
[E] table 3)
50 Hz [5] [0]
60 Hz [6]
LD73 LD74
Between Non-inverter
inverter compressor
Abnormal [E]
Normal [0]
---------- ----------
Cooling frequency [00-1F]
(Refer to conversion table 2)
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Cooling frequency [00-1F]
(Refer to conversion table 2)
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