1 2 - 2 - 1 . D etail C ontents in R eq uest C ode
[ O p eration state] ( R eq uest c ode " 0 " )
Data display
C 4
Operation mode
Display
Operation mode
0
STOP FAN
C
COOL DRY
H
HEAT
d
DEFROST
[ I ndoor unit – C ontrol state] ( R eq uest c ode "5 0 ")
Data display
[ O utdoor unit – C ontrol state] ( R eq uest c ode " 5 1 ")
Data display
0
0
0
0
Normal
0
0
0
1
Preparing for heat operation
0
0
0
2
Defrost
[ C omp ressor – F req uenc y c ontrol state] ( R eq uest c ode "5 2 ")
Data display
0
0
1
Freq uency control state
Display
Current limit control
0
No current limit
1
Primary current limit control is ON.
2
Secondary current limit control is ON.
OCH526C
A
C
B
D
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
Freq uency control state
Freq uency control state 2
Freq uency control state 1
Power currently
Display
Compressor
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
Req uesting compressor to turn OFF
F
There are no corresponding units.
2
Discharge temperature Condensation temperature
Display
overheat prevention
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
Ex ample) Req uest code "004"
Discharge temperature 69 :
Refrigerant address "00"
A: Maintenance mode display
B : Refrigerant address
C: Data display area
D: Req uest code display area
Four-way valve Solenoid valve
–
–
ON
ON
ON
ON
ON
ON
ON
ON
ON
Anti-freeze
protection control
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
–
ON
ON
ON
ON
Heatsink temperature
overheat prevention
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled