Page 7
SL18XP1 SERIES
STEP 2 -- ELECTRICAL (Continued) -- Outdoor Control (A175) Jumpers and Terminals
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
30
0
30
SECOND DELAY
SECOND DELAY
0
CUT FOR HUMIDITROL
®
- ENHANCED
DEHUMIFICATION ACCESSORY (EDA)
APPLICATIONS.
SECOND-STAGE LOCK-IN
TEMPERATURE
J4 - COMPRESSOR
SHIFT DELAY
DS TO R LINK - EDA
APPLICATION
J2 - SECOND-STAGE
LOCK-IN
TEMPERATURE
(DEFAULT)
7-SEGMENT DISPLAY
PUSH BUTTON
NOTE - LINK NOT APPLICABLE TO SINGLE-STAGE
UNIT. CUTTING LINK WILL HAVE NO AFFECT ON
OPERATION OF SINGLE-STAGE UNITS
.
MAX
90
DEGREE
TARGET
70
DEGREE
TARGET
50
DEGREE
TARGET
90
70
50
TARGET
90
70
50
90
70
50
MAX
90 70 50
J1 - DEFROST TERMINATION
TEMPERATURE
J3 - DEFROST AUTO
OFF
ON
JUMPER ON PINS 1 AND 2
DEFROST AUTO ENABLED
DEFROST AUTO DISABLED (DEFAULT)
90
70
50
(DEFAULT)
(DEFAULT WHEN JUMPER IS
REMOVED OR MISSING)
90
MAX
MAX
MAX
MAX
JUMPER ON PINS 2 AND 3
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.
(HEAT PUMP ONLY)
(TWO-STAGE HEAT PUMP ONLY)
(TWO-STAGE UNIT ONLY)
(HEAT PUMP ONLY)
FIGURE 7
