Mitsubishi Electric PU-P71VHA 2.UK Series Service Manual page 93

<Detail contents in req uest cod e>
12-2-1. Detail Contents in Req uest Cod e
[ Operation state] (Req uest cod e : " 0" )
Data display
C 4
Operation mode
Display Operation mode
0 STOP • FAN
C COOL • DR Y
H HEAT
d DEFROST
[ Ind oor unit – Control state] (Req uest cod e : " 50 " )
Data display
[ Outd oor unit – Control state] (Req uest cod e : " 51" )
Data display
0 0 0 0 Normal
0 0 0 1 Preparing for heat operation
0 0 0 2 Defrost
[ Compressor – Freq uency control state] (Req uest cod e : " 52" )
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.
OC37 9 J
A C
D B
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
ON
A
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 Re q 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
9 3
Ex ample) Req uest code "004"
Discharge temperature 6 9 :
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