Mitsubishi Electric CITY MULTI PUHY-P108 Service Handbook page 372

4. Table of LED Codes
LED monitor display
SW
No
1234567890
Relay out-
put display 1
Lighting
0 0000000000
Check (er-
ror) display 1
OC error
Check (er-
ror) display 2
OC error
1 1000000000
Check (er-
ror) display 3
2 0100000000
(Including IC
and BC)
Relay out-
put display 2
3 1100000000
Relay out-
4 0010000000
put display 3
Relay out-
5 1010000000
put display 4
6 0110000000
Special con-
trol
7 1110000000
8 0001000000
Communica-
tion demand
9 1001000000
capacity
Contact
point de-
10 0101000000
mand ca-
pacity
External sig-
nal
(Open input
11 1101000000 contact
point)
12 0011000000
13 1011000000
Outdoor unit
operation
status
14 0111000000
15 1111000000
Item
LD1 LD2 LD3
Comp in Comp 1 Comp 2
opera- in oper- in oper-
tion ation ation
0000 to 9999 (Address and error codes highlighted)
0000 to 9999 (Address and error codes highlighted)
0000 to 9999 (Address and error codes highlighted)
21S4a 21S4b
SV1 *SV2 SV3
*SV5a SV5b
Emer-
Retry
gency
opera-
opera-
tion
tion
Contact
Night Snow
point
mode sensor
demand
BC op- 3-min-
Warm
eration utes re-
up
com- start
mode
mand mode
- 363 -
[ X LED monitor display on the outdoor unit board ]
Display
LD4 LD5 LD6 LD7
52C1 52C2
CH11 CH12
*SV4a *SV4b *SV4c
*SV4d 52F
0000 to 9999
0000 to 9999
Cool- Cool-
ing- ing-
heating heating
change change
over over
(Cool-
(Heat-
ing) ing)
3-min-
utes re-
Com- start
Prelimi-
pressor after in-
nary er- Error
in oper- stanta-
ror
ation neous
power
failure
Remarks
LD8
LD8 stays lit at
Always
all times while
lit
the power to the
microcomputer
is on.
Display of the
latest prelimi-
nary error
If no preliminary
errors are de-
tected, "----" ap-
pears on the
display.
If no errors are
detected, "----"
appears on the
display.
Items marked
with * are only
applicable to the
PURY series.
If not demanded
controlled, "----"
[ % ] appears on
the display.
If not demanded
controlled, "----"
[ % ] appears on
the display.
Items marked
with * are only
Prelimi-
applicable to the
nary low
PURY series.
pres-
sure er-
ror