Mitsubishi Electric City Multi PQHY-P72 Service Handbook page 317

[ X LED Monitor Display on the Heat Source Unit Board ]
SW
No
1234567890
Indoor unit
16 0000100000
check
17 1000100000
18 0100100000
19 1100100000
20 0010100000
21 1010100000
22 0110100000
Indoor unit
23 1110100000
Operation
mode
24 0001100000
25 1001100000
26 0101100000
27 1101100000
28 0011100000
29 1011100000
Indoor unit
30 0111100000
thermostat
31 1111100000
32 0000010000
33 1000010000
34 0100010000
35 1100010000
36 0010010000
BC all indoor
units Opera-
37 1010010000 tion mode
38 0110010000
Heat source
39 1110010000 unit Opera-
tion mode
40 0001010000
41 1001010000
Heat source
unit control
42 0101010000
mode
43 1101010000
Item
LD1 LD2 LD3
Unit No. Unit No. Unit No.
1 2
Unit No. Unit No. Unit No.
9 10
Unit No. Unit No. Unit No.
17 18
Unit No. Unit No. Unit No.
1 2
Unit No. Unit No. Unit No.
9 10
Unit No. Unit No. Unit No.
17 18
Unit No. Unit No. Unit No.
1 2
Unit No. Unit No. Unit No.
9 10
Unit No. Unit No. Unit No.
17 18
*Cool- *Cool- *Heat-
ing only ing only ing only
ON OFF ON
Permis-
Cooling
sible Standby
only
stop
Abnor-
Thermo
Stop mal
OFF
stop
Refrig-
Warm
erant
up
recov-
mode
ery
- 308 -
Display
LD4 LD5 LD6
Unit No. Unit No. Unit No.
3 4 5 6
Unit No. Unit No. Unit No.
11 12 13 14
Unit No. Unit No. Unit No.
19 20 21 22
Unit No. Unit No. Unit No.
3 4 5 6
Unit No. Unit No. Unit No.
11 12 13 14
Unit No. Unit No. Unit No.
19 20 21 22
Unit No. Unit No. Unit No.
3 4 5 6
Unit No. Unit No. Unit No.
11 12 13 14
Unit No. Unit No. Unit No.
19 20 21 22
*Mixed
*Mixed
*Heat- mode
mode
ing only opera-
opera-
OFF tion
tion ON
OFF
*Cool- *Heat-
Heating
ing ing
only
main main
Sched-
Initial
uled Defrost
start up
control
Remarks
LD7 LD8
Unit No. Unit No. The lamp that
7 8 corresponds to
the unit that
Unit No. Unit No.
came to an ab-
15 16
normal stop
lights.
Unit No. Unit No.
The lamp goes
23 24
off when the er-
ror is reset.
Each unit that
comes to an ab-
normal unit will
be given a se-
quential number
in ascending or-
der starting with
1.
Unit No. Unit No. Lit during cool-
7 8 ing
Lit during heat-
Unit No. Unit No.
ing
15 16
Unlit while the
unit is stopped
Unit No. Unit No.
or in the fan
23 24
mode
Unit No. Unit No. Lit when thermo-
7 8 stat is on
Unlit when ther-
Unit No. Unit No.
mostat is off
15 16
Unit No. Unit No.
23 24
Items marked
with * are only
*Venti-
*Stop applicable to the
lation
PQRY series.
Low fre-
Oil bal- quency
ance oil re-
covery