Toshiba Carrier MMC-AP0181H2UL, Service Manual

Page: 97 / 178

97
Ch e ck cod e
L ocat i on
o f
d e t e ct i on
D e scr i pt i on Syst e m status
E rror d e t e ct i on
cond i t i on(s)
Ch e ck i t e ms ( l ocat i ons)
M a i n
r e mot e
contro lle r
Outdoor 7 - s e gm e nt d i sp l ay
Ch e ck cod e Sub - cod e
L 29 L 29
Symbo l O
s i gn i f i es s i te of
I PDU error .
I/F E rror i n N o . of
I PDUs
A ll stop I nsuff i c i ent number of I PDUs
are detected when power i s
turned on .
• Check mode l sett i ng of
P . C . board for serv i c i ng
outdoor I/F P . C . board .
• Check connect i on of UAR T
commun i cat i on connector .
• Check A3 -I PDU, fan I PDU,
and I/F P . C . board for
defect .
L 30 L 30
L 31
Detected i ndoor
address
I ndoor
un i t
E xterna l
i nter l ock of
i ndoor un i t
Stop of
correspond i ng
un i t
• S i gna l i s present at
externa l error i nput
term i na l (C N 80) for 1
m i nute .
Wh e n ex t e rna l d e v i c e i s
conn e ct e d to C N 8 0
conn e ctor :
1) Check for defect i n
externa l dev i ce .
2) Check for defect i n i ndoor
P . C . board .
Wh e n ex t e rna l d e v i c e i s not
conn e ct e d to C N 8 0
conn e ctor :
1) Check for defect i n i ndoor
P . C . board .
– –
I/F E xtended I C
error
Cont i nued
operat i on
T here i s part fa il ure i n P . C .
board ( I/F ) .
Check outdoor P . C . board
( I/F ) .
P01 – –
I ndoor
un i t
I ndoor fan
motor error
Stop of
correspond i ng
un i t
• Check the l ock of fan motor
(AC fan) .
• Check w i r i ng .
P03 P03 –
I/F D i scharge
temperature
T D1 error
A ll stop D i scharge temperature ( T D1)
exceeds 239 °F (115 ° C)
• Check outdoor serv i ce
va l ves (gas s i de, li qu i d
s i de) to conf i rm fu ll
open i ng .
• Check outdoor PMVs
(PMV1, 2, 4 ) for c l ogg i ng .
• Check res i stance
character i st i cs of T D1
sensor .
• Check for i nsuff i c i ency i n
refr i gerant quant i ty .
• Check for defect i n 4- way
va l ve .
• Check for l eakage of SV 4
c i rcu i t .
• Check SV 4 c i rcu i t (w i r i ng
or i nsta ll at i on error i n
SV 4 1, SV 4 2 or SV 4 3) .
A3 -I PDU F an
I PDU
O
O
O
O
O
O
O
O
2 3 1
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
01
02
03
0
4
05
06
07
08
09
0A
0B
0C
0D
0 E
0 F