2-1. Detail Contents in Request Code
[Operation state] (Request code "0")
Data display
C 4
Operation mode
Display
Operation mode
0
STOP • FAN
C
COOL • DRY
H
HEAT
d
Defrost
[Indoor unit – Control state] (Request code :" 50")
Data display
[Outdoor unit – Control state] (Request code "51")
Data display
0
0
0
0
Normal
0
0
0
1
Preparing for heat operation.
0
0
0
2
Defrost
[Compressor – Frequency control state] (Request code "52")
Data display
0
0
Frequency control state
Display
Current limit control
0
No current limit
1
Primary current limit control is ON.
2
Secondary current limit control is ON.
Relay output state
Relay output state
Operation mode
Unit No. 4 state
Unit No. 3 state
Unit No. 2 state
Unit No. 1 state
State
Frequency control state
Frequency control state
Frequency control state
Power currently
Display
supplied to compressor
0
–
1
2
3
4
5
6
7
8
ON
A
ON
Display
State
0
Normal
1
Preparing for heat operation.
2
–
3
–
4
Heater is ON.
5
Anti-freeze protection is ON.
6
Overheat protection is ON.
7
Requesting compressor to turn OFF.
F
There are no corresponding units.
Discharge temperature Condensation temperature
Display
overheat prevention
0
1
Controlled
2
3
Controlled
4
5
Controlled
6
7
Controlled
8
9
Controlled
A
b
Controlled
C
d
Controlled
E
F
Controlled
Example) Request code "004"
Discharge temperature 69°C
Refrigerant address "00"
B: Refrigerant address
C: Data display area
D: Request code display area
Compressor
Four-way valve Solenoid valve
–
–
ON
ON
ON
ON
ON
ON
ON
ON
ON
Anti-freeze
overheat prevention
protection control
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
–
ON
ON
ON
ON
Heat sink temperature
overheat prevention
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
53