Page 7
XP21 SERIES
STEP 2 -- ELECTRICAL (Continued) -- Outdoor Control (A175) Jumpers and Terminals
J1 - DEFROST TERMINATION TEMPERATURE
1. The
J1
jumper is factory set to
50°F
(10°C). This jumper can also be set to
70°F
,
90°F,
100°F
or
MAX
(21°C, 32°C, 38°C and MAX). If a jumper is not present on
J1
, the default termination temperature is
MAX
.
NOTE Colder climates could require a higher defrost termination temperature setting to maintain a clear coil.
2. If the
J1
jumper is set to
MAX
, defrost will run
maximum defrost sequence
.
J3 - DEFROST AUTO
1.
Defrost Auto
can be set to either
ON
or
OFF
.
Factory default setting is
OFF
.
Note
: If the jumper is miss
ing the default is
OFF
.
2.
Defrost Auto
is set to
OFF
- Defrost will run and terminate based on
J1
setting.
3.
Defrost Auto
is set to
ON
- Defrost termination setting may differ from the actual
J1
jumper setting. The
actual defrost termination will be determined based on the following rules:
A.
.
The first defrost after the unit is powered up, or the first defrost after cooling call will terminate based
on the J1 setting.
B.
.
The control accumulates heating runtime between defrost cycles:
Heating time between defrost is less than 50 minutes
- The defrost termination temperature
will be increased for the next defrost cycle based on current termination setting. If current ter
mination setting is
<70°F
then the next defrost termination will be
90°F
. If J1 is set at
>70°F
or
MAX
the next defrost termination will be
MAX
.
Heating time between defrosts is longer than 1 hour for 2 consecutive heating cycles
- The defrost termination will be decreased for the next defrost cycle. If the termination is set
at 50°F, 70°F, or 90°F, then defrost termination will follow the
J1
jumper setting. If the
J1
is set
to
MAX
, then the next defrost termination will be
90°F
.
C.
.
If
J1
is set to
MAX
, the system will always run at
MAX
when accumulated compressor
OFF
time
is longer than
30 minutes and ambient temperature is less than 35°F
.
D.
.
When the ambient sensor temperature is
higher than 40°F,
and
J1
is set to
MAX
, defrost termina
tion will be
90°F
. If
J1
is to
50°F, 70°F, 90°F or 100°F ,
defrost termination will follow the
J1
setting.
55
50
DEGREE
TARGET
45
DEGREE
TARGET
40
DEGREE
TARGET (DEFAULT )
55 50 45 40
55 50 45 40
55 50 45 40
55 50 45 40
DEGREE
TARGET
100
90
DEGREE
TARGET
70
DEGREE
TARGET
50
DEGREE
TARGET
90F 70F 50F
TARGET
90F 70F 50F
90F 70F 50F
100F 90F 70F 50F
30
0
30
SECOND DELAY
SECOND DELAY
0
Cut for Humiditrol
®
−
Enhanced
Dehumification Accessory (EDA)
applications.
SECOND
−
STAGE LOCK
−
INTEMP
(HP ONLY) J4
J1 (HP ONLY)
J3 (HP ONLY)
DS TO R
(TWO
−
STAGE UNIT ONLY)
(TWO
−
STAGE HEAT
PUMP ONLY) J2
DEFROST TERMINATION TEMP
COMPRESSOR SHIFT DELAY
DEFROST AUTO
OFF
ON
JUMPER ON BOTH PINS
DEFROST AUTO ENABLED
DEFROST AUTO DISABLED (DEF AULT)
(DEFAULT)
90F 70F 50F
(DEFAULT)
ENABLED WHEN JUMPER IS
REMOVED OR MISSING)
NOTE
−
LINK NOT APPLICABLE TO
SINGLE
−
STAGE UNITS. CUTTING LINK WILL
HAVE NO AFFECT ON OPERATION OF
SINGLE
−
STAGE UNITS
.
100F
100F
100F
100F
JUMPER ON ONE PIN
R
C
I+
I
−
Y1
OY
2
W
DS
L
LPS
HPS
Y1
CNTCTR
C
Y2 S
REV
Y2
C
FPWM
Cut for option
DS to R
H I G H
V O L T A G E
55F
50F
45F
40F
100F
90F
70F
50F
OPEN =OFF
OPEN =90F
LOCK IN
2 ST
AGE
DEFROST
DFST
AUTO
SHFT DL
Y
Assy # 105250
UC
ECM
ECM
C
C
Liq. P
Suct. P
Liq/Suct T
COIL
AMB
DIS
or MAX
TERM.
nd
F1
R81
R80
R75
R72
R69
R77
Q8
Q7
TVS8
R40
R140
R137
H1
H10
R34
DNI2
S9
TVS3
R66
R128
R107
R58
Q9
D17
R59
R79
R39
TVS7
TVS4
TVS2
R37
R1
1
R103
U2
K2
K1
K5
K7
K4
F4
D45
R91
R90
R55
R54
R53
R52
R51
R50
R36
R147
C32
R146
L1
C30
C33
U6
R144
R130
R145
R143
D44
D43
H8
C29
C19
R63
U5
C28
R33
R99
R16
R120
R129
R123
R32
R124
R29
R8
R3
R133
R127
R9
R2
R134
R126
C9
C12
H5
H3
D39
D38
R64
R1
16
R1
15
R1
14
R1
13
R1
12
R1
11
R1
10
R109
R96
R92
R5
R21
R19
R18
R13
R1
17
R97
R93
R73
R6
R22
R20
R14
R1
18
R78
R98
R95
R94
R7
R25
R23
R15
R1
19
R76
R88
R86
R83
R67
R30
C14
TP6
R60
R57
R48
R46
R44
R56
R47
R45
R31
Q4
Q15
Q14
Q13
Q12
D35
D2
D14
D1
1
D10
R142
R141
P6
P1
H15
C4
C17
U1
D52
C7
C5
C27
C26
C24
C23
C22
C21
C16
C15
C18
H2
D41
R132
D55
R89
D54
R87
D34
D53
H6
R85
D26
R26
R61
R38
C13
R68
H7
D23
R101
D37
F5
F3
C1
1
R74
TVS6
TVS5
D19
D13
R12
D27
D25
Q6
C25
D15
D24
R62
C1
C8
C20
C6
P23
P5
DSP1
P2
D36
D29
R43
P12
D9
R71
D42
D32
R70
D30
D33
H14
R139
P18
P17
R42
Q3
Q1
1
P3
U10
DNI1
R28
R27
P38
P7
R108
Q2
Q1
R41
R138
R65
R150
D47
H4
D31
C3
D7
D16
D6
D5
D12
D1
R35
C68
TVS1
R17
R10
H9
R24
D4
D8
R4
Q5
P16
P15
D3
R1
P4
Y2
SW1
C10
7
−
SEGMENT
DISPLAY
PUSH
BUTTON
DEGREE
(MAX DEFROST IS
SECOND
−
STAGE LOCK
−
IN FACTORY
DEFAULT SETTING FOR
J2
IS
40
5
F
. IF
JUMPER IS REMOVED OR MISSING,
DEFAULT IS
OFF
.
FIGURE 7
