XT6
6
7
XT
7
6
7
XT
8
A
BX
Y
E
12
3
4
5
CON
NE
CT
TO
SOLA
R
PU
MP
ST
AT
IO
N
230
VA
C
INP
U
T
SV
1
SL
1
SL
2
ON
OF
F
N
P_
o
N
SV2
N
12
4
6
7
5
89
18
19
P_s
N
22
23
N
21
TB
H
ON
OF
F
6
7
N
21
SO
LA
R
PU
M
P
CO
NT
RO
L
SIG
NA
L
O
U
TP
U
T
TA
N
K
BO
O
S
T
H
EA
TE
R
CO
NT
RO
L
SIG
NA
L
O
UT
PU
T
TA
N
K
BO
O
S
T
H
EA
TE
R
CO
NT
RO
L
SIG
NA
L
O
UT
PU
T
PU
M
P
O
CO
NT
RO
L
SI
G
NA
L
O
UT
PU
T
AH
S1
AHS
2
27
28
AD
D
IT
ION
AL
HE
AT
SO
URC
E
P_
d
N
29
30
PU
M
PD
CO
NT
RO
L
SIG
NA
L
O
UT
PU
T
KM
5
A1
A2
FUS
E
SV
1
M1
M2
9
10
P
QE
67
8
SV
1
SV2
HT
N
A1
10
11
SO
LAR
PU
M
P
P_
c
N
16
17
H
13
SO
LAR
IN
PU
T
Me
tho
d 1
:
Me
tho
d 2
:
IB
H1
20
A1
12
14
C
H
3
HE
AT
L1
H
13
14
C
H
3
L1
H
13
14
C
H
3
L1
SV
1
NORM
A
L
OP
E
N
TE
RM
IN
A
L
NORM
A
L
CL
OS
E
TE
R
M
IN
A
L
NE
UT
RA
L
TE
RM
IN
A
L
ON
OF
F
N
AD
DI
TI
ON
AL
HE
AT
SO
UR
CE
AD
D
IT
IO
NA
L
HE
AT
SO
URC
E
CO
NT
RO
L
SI
G
NA
L
O
UT
PU
T
WA
TE
RT
AN
K
CI
RCU
LA
TIN
GP
UM
P
P_
d:PU
MP
D
SV
1
N
21
CO
N
NE
CT
TO
W
IR
E
C
ON
TR
OLER
.
PL
EASE
USE S
HIEL
DED
W
IREAN
D EA
RT
HT
HE
WI
RE
.
DH
W
ELEC
TRI
C BAC
KU
P H
EA
TI
NG
O
UT
SI
DE
CI
RCL
E
PUM
P
CLOS
E
:S
HUT
DOW
N
SW
IT
CH
FU
SE
A1A1
A2
24
PC
COOL
PO
WE
R IN
HE
AT
Met
ho
d 1:
Me
thod 2:
Me
thod 3:
PC
PO
WE
R IN
PC
PO
WE
R I
N
PC
PO
WE
R IN
Ext
er
mal
O
N/
OFF t
her
mast
at
AN
TI
FR
EE
ZE
E
-H
E
AT
IN
G
TA
PE
CONT
RO
L S
IGNA
L
OUT
PU
T
PU
MP
C
CO
NT
RO
LS
IG
NA
LO
UT
PUT
FUS
E
R1
R2
25
26
FUS
E
DTF1
DTF2
31
32
AD
D
IT
ION
AL
HE
AT
SO
U
R
C
E
CO
NT
RO
L
SIG
N
A
L
O
UT
PU
T
H
YD
R
O-
BOX
C
ON
TR
OL
BOA
R
D
RE
MO
TE
SHUT
D
O
W
N
RE
SE
RV
ED
RE
MO
TE
ALARM
ANTI
FREE
ZE
E-
HE
AT
ING
TA
PE
PU
M
PC
RO
OM
TH
ER
MO
ST
AT
PC
:ROOM
TH
ER
MO
STA
T
1.Pow
er
suppl
y of
m
ac
hin
e an
d r
oom
ther
mos
tat
m
us
t b
e c
on
nec
ted t
o
the
sam
e N
eu
tral
Li
ne
and
(A
) Phas
e Li
ne
.
2.F
or m
ore
in
for
ma
tio
n,p
lea
se
re
fer
to
IN
S
TA
LL
AT
IO
N &
O
W
NE
R'
S M
AN
UA
L
Ext
er
mal
O
N/
OFF t
her
mast
at
RUNN
ING
DE
FR
OS
TIN
G
PR
OM
PT
SIG
NAL
AD
DI
TI
ON
AL
HE
AT
SO
URC
E
Le
ak
ag
e
Pr
ot
ect
io
n
Swi
tc
h
m
us
tb
e
in
st
al
le
d
to
th
e
Po
we
r
M
A
IN
C
O
NT
R
OL
B
O
AR
D
SW
4
Te
m
p
.S
enso
rcod
e
T3
/T4
/T5
/T6
Pr
ope
rt
y
val
ue
s
B
=4
10
0K
R
=1
0k
Ω
S
MA
IN
CO
NT
RO
L B
OA
RD
Figure
2
‐
4.2:
HTW
‐
V1
2
(16)
WD2N8
wiring
diagram
(continued)
Sequ
enc
e
0
2
C
ont
en
t
No
rm
al
d
isp
la
y :O
FF
:0
;O
N:
T1
(S
ho
w
Tw
out
W
hen
T1 i
nv
al
id
an
d
in
cludi
ng
T1
is
no
t s
et
or
T1 f
aul
t)
Ca
pac
ity
requ
irem
ent
s
1
Mode
(0/
Off
,2/
Coo
l,3/
He
at
,5/
Heat
w
at
er)
3
Ca
pac
ity
requ
irem
ent
s
(Co
rre
ct
)
m
us
tb
e
in
st
al
le
d
to
th
e
Po
we
r
Su
pp
lyo
ft
hee
le
ct
rich
ea
tin
g.
Equi
pm
ent
mus
t be
grounde
d.
ON
3
2
1
M
A
IN
C
O
NT
R
OL
B
O
AR
D
FA
C
TO
R
Y
S
E
TTI
N
G
NO
TE
Eq
ui
pme
nt
m
us
t be
g
rounde
d.
T3
/T4
/T5
/T6
Tp
B
25/
50
=4
10
0K
,
R
25
℃
=1
0k
Ω
B
25/
50
=3
950K
,
R
90
℃
=5
k
Ω
2
0
N
or
m
al
di
sp
lay
: O
FF
:0
;
ON
:fr
equ
enc
y
1
M
ode:
0:
O
ff;
2:
Coo
l
3:
Heat
;4:
For
ce C
ool
Fa
n spe
ed
Seque
nce
Co
nt
ent
CODE
PA
R
T N
AM
E
C
om
pre
sso
r
CT
1
AC
c
urren
t det
ec
to
r
COM
P.
CA
P1
,C
AP
2
E
lect
rol
yt
ic
capaci
to
r
CO
D
E
PA
RT
NA
M
E
6
7
8
10
T1S
Ta
T5
T2B
4
T1
5
T1B
9
T2
y(
)
S1
ON
OFF
Ex
te
rn
al
lo
ad
cu
rr
en
t i
s n
eed
ed
les
s th
an
0
.5A
, i
f th
e
lo
ad
c
ur
ren
t i
s
gr
ea
te
r th
an
0.
5A,
th
e l
oa
d m
ust
be
c
ontrol
le
d t
hr
ough
AC
c
ont
ac
to
r. E
ac
h e
xte
rna
l l
oa
d
cur
re
nt
is
ne
ede
d l
es
s t
ha
n 0
.5
A
.
qp
g
Al
l hi
gh-
vol
ta
ge
e
xt
er
na
l l
oa
d,
if
it
is
m
et
al or
a
grounde
d port, m
us
t be
gr
ounde
d.
"A
HS
1"
"
AHS
2"
, "
A
1"
"
A
2"
, "
R
1"
"
R
1"
a
nd "
D
TF1
" "
D
TF2
" w
iri
ng t
erm
ina
l ports
pr
ov
ide
only
the
sw
itc
h s
ig
na
l.
3
4
6
7
Tp
Capa
cit
y r
equi
rem
ent
s
T3
5
T4
Capa
cit
y r
equi
rem
ent
s
(C
orr
ec
t)
8
HE
AT
1
EE
V.
El
ec
tri
c e
xpa
ns
iv
e
va
lv
e
O
utd
oo
r fa
n m
oto
r
FA
N
H-
PR
O
L-
PR
O
C
om
pr
es
so
re
le
ct
ric
al
he
at
in
g
tap
e
H
ig
h p
re
ssu
re
sw
itch
Lo
w
p
re
ssu
re
sw
itch
Ma
gne
tic
ri
ng
MR
1-
MR
8
Pr
ess
ur
e s
ens
or
H
-PR
ES
CO
D
E
PA
RT
NA
M
E
TW
_out
TW_
in
T2
B
T2
Tem
p.
sen
so
r f
or t
he
bac
kup
heat
er
ex
chan
ger out
let
w
at
er
Tem
p.
se
nso
r f
or
exc
han
ger
ou
tle
t wat
er
Te
m
p.
sens
or f
or i
nl
et
w
at
er
Tem
p.
sens
or
for
ref
rig
er
an
t ga
s
Te
m
p.
se
ns
or f
or re
fri
ge
ra
nt
liq
uid
T1
12
10
11
Tw
_i
n
Tw
_out
T2B
13
C
ur
rent IB
H
1
14
15
16
17
C
ur
rent IB
H
2
T4
Las
t f
aul
t
La
st
se
con
d f
ai
lu
re
S1
ON
34
2
1
ON
34
2
1
ON
ON
34
2
1
ON
34
2
1
ON
ON
OFF
PIPE
T1
IBH
1
50m
5m
YE
S
N
O
N
12
8
10
11
Th
Com
pr
ess
or
c
ur
rent
In
pu
t v
olta
ge
DC
bu
s vo
lta
ge
13
9
In
pu
t c
ur
re
nt
14
El
ec
tri
c ex
pan
siv
e val
ve
--
STF1
T3
T4
4-
W
ay va
lve
Cond
ens
er
tem
p.
sens
or
O
ut
do
or
am
bien
t
temp
sens
or
PTC
1,
PTC2
Th
er
m
al
re
sis
to
r
R1
R
esi
st
or
gg
SV5
SV6
Chas
sis
el
ec
tri
cal
he
at
ing t
ape
SV6
va
lv
e
PR
O
_H
YD
XT
6-
XT
10
Te
rmi
nal
bl
ocks
FS
T
ex
chan
ger out
let
w
at
er
T1
B
Te
mp
.e
ns
or
fo
r s
an
ita
ry
wa
te
r
Tem
p.
sen
sor
for
heat
ing/
cool
ing
wat
er
T5
Flow
s
w
itc
h
Fl
i
t
h
E
H
ti
t
17
18
19
20
La
st
se
con
d f
ai
lu
re
Las
tt
hi
rd
fa
ilu
re
--
So
ftw
are
v
ers
io
n
34
2
1
34
2
1
ON
34
2
1
IBH
1
IB
H
2
NO
N
YE
S
YE
S
N
O
N
S2
ON
OFF
Pr
es
su
re
va
lu
e
DC
bu
s vo
lta
ge
14
15
16
17
18
La
st
faul
t
So
ftwa
re
v
er
sio
n
--
XT
1,
XT
3
T4
T5
O
ut
do
or
am
bien
t
temp
.s
ens
or
C
omp
re
sso
r d
isch
ar
ge
temp.s
ens
or
Term
inal bloc
k
ZR
1
Vo
ltag
e de
pe
nd
en
t r
es
is
tor
T6
Suc
tion
te
m
p.
s
ens
or
FS
_T
EV
_T
EX_
T
Fl
ow
sw
itc
h E
-H
ea
ting
tap
e
Ex
pa
nsio
n v
alv
e E
-H
eat
ing
ta
pe
Pl
at
e he
at
ex
cha
nger
E
-H
eat
in
g t
ape
ON
34
2
1
ON
34
2
1
T1
B
NO
N
YE
S
ON
34
DI
P
2
1
ON
34
DI
P
2
1
FA
C
T
O
R
Y
SET
T
IN
G
S1
S
2
Se
t
S
3
to
0
S3
32
