Toshiba MMU-AP0057MH-E, Service Manual

Page: 74 / 107

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Check code
Location
of
detection
De s cription S y s tem s tatu s
Problem detection
condition( s )
Check item s (location s )
• Check for di s connection of
TK1 s en s or.
• Check re s i s t a nce
ch a r a cteri s tic s of TK1
s en s or.
• Check for connection
tro
ub le involving TK1, TK2,
TK4, a nd TK5 s en s or s .
• Check for clogging in oil
eq
ua lizing circ u it c a pill a ry
a nd f a il u re oper a tion in
check v a lve.
• Check for refriger a nt
entr a pment in s ide
compre ss or.
I/F 01:
TK1 oil circ
u it
pro b lem
02:
TK2 oil circ
u it
pro b lem
04:
TK4 oil circ
u it
pro b lem
05:
TK5 oil circ
u it
pro b lem
Oil level
detection circ
u it
tro ub le
All s top No temper a t u re ch a nge i s
detected b y TK1 de s pite
compre ss or 1 h a ving b een
s t a rted.
H16 H16
• Check o u tdoor u nit model.
(Check whether the
o
u tdoor u nit corre s pond s
to Air to Air He a t
Exch a nger type or not.)
Indoor u nit O u tdoor u nit s
model
di
sa greement
pro b lem
S top of
corre s ponding
u nit
In c as e of different o u tdoor
u nit (Not corre s ponded to
Air to Air He a t Exch a nger
type)
L02 L02 —
• Check indoor a ddre ss e s .
• Check for a ny ch a nge
m a de to remote controller
connection (gro u p/
individ ua l) s ince indoor
a ddre ss s etting.
Indoor u nit D u plic a ted
indoor he a der
u nit
S top of
corre s ponding
u nit
There a re more th a n one
he a der u nit s in gro u p.
L03 — —
• Check line a ddre ss e s . I/F D u plic a ted
o u tdoor line
a ddre ss
All s top There i s d u plic a tion in line
a ddre ss s etting for o u tdoor
u nit s b elonging to different
refriger a nt piping s y s tem s .
L04 L04 —
• Check di s pl a y on priority
indoor u nit.
I/F D u plic a ted
priority indoor
u nit ( as
di s pl a yed on
priority indoor
u nit)
All s top More th a n one indoor u nit s
h a ve b een s et u p as priority
indoor u nit.
L05 — —
• Check for di s connection of
TK2 s en s or.
• Check re s i s t a nce
ch a r a cteri s tic s of TK2
s en s or.
• Check for connection
tro
ub le involving TK1, TK2,
TK4, a nd TK5 s en s or s .
• Check for clogging in oil
eq
ua lizing circ u it c a pill a ry
a nd f a il u re oper a tion in
check v a lve.
• Check for refriger a nt
entr a pment in s ide
compre ss or.
No temper a t u re ch a nge i s
detected b y TK2 de s pite
compre ss or 2 h a ving b een
s t a rted.
• Check for di s connection of
TK4 s en s or.
• Check re s i s t a nce
ch a r a cteri s tic s of TK4
s en s or.
• Check for connection
tro
ub le involving TK1, TK2,
TK4, a nd TK5 s en s or s .
• Check for clogging in oil
eq
ua lizing circ u it c a pill a ry
a nd f a il u re oper a tion in
check v a lve.
• Check for refriger a nt
entr a pment in s ide
compre ss or.
No temper a t u re ch a nge i s
detected b y TK4 de s pite
compre ss or h a ving b een
s t a rted.
• Check for di s connection of
TK5 s en s or.
Check re s i s t a nce
ch a r a cteri s tic s of TK5
s en s or.
• Check for connection
tro
ub le involving TK1, TK2,
TK4, a nd TK5 s en s or s .
• Check for clogging in oil
eq
ua lizing circ u it c a pill a ry
a nd f a il u re oper a tion in
check v a lve.
• Check for refriger a nt
entr a pment in s ide
compre ss or.
No temper a t u re ch a nge i s
detected b y TK5 de s pite
compre ss or h a ving b een
s t a rted.
Main
remote
controller
Outdoor 7- s e g ment di s play
Check
code
S ub-code