Detail Contents In Request Code; Relay Output State; Data Display; Frequency Control State - Mitsubishi Electric PUZ-A18NHA4 Service Manual

13-2-1. 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 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 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
101
Example) Request code "004"
Discharge temperature 156°F
Refrigerant address "00"
A: Mode display
B: Refrigerant address
C: Data display area
D: Request code display area
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
Heatsink temperature
overheat prevention
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled