10
INPUTS / OUTPUTS
10.1 Digital Inputs
Note -ARB is only used on YLAA and YLAE units.
10.2 Analogue Inputs
1
-
35
Form 201.26.OI1(11/09)
INPUT
-AMB
DESCRIPTION
IDENT
J11-1,3,4,5,6,7
0V
J11-7,8,9,10
+5V
1
J11-11
REMOTE TEMP RESET +SIGNAL
-ARTE
2
J11-6
REMOTE TEMP RESET -SIGNAL
-ARTE
3
J11-12
NOT USED
-R2
4
J11-13
YLAE TWO SPEED FAN, FULL SPEED INHIBIT
-ARB K22
5
J11-14
HYDRO KIT PUMP TRIP 1 (if fitted)
-ARB K24
6
J11-15
HYDRO KIT PUMP TRIP 2 (if fitted)
-ARB K23
J6-1,2,3
0V
J6-4,5,6
+5V
7
J6-7
LEAVING LIQUID TEMPERATURE COLD
-BLCT
8
J6-8
RETURN LIQUID TEMPERATURE COLD (if fitted)
-BECT
9
J6-9
AMBIENT TEMPERATURE (YLAA and YLAE units only)
-BAMB
J7-1,2,3,4,7,9
OV
J7-5,6,8
+5V
10
J7-10
SYS 1 SUCTION PRESSURE
=1-BSP
11
J7-11
SYS 1 DISCHARGE PRESSURE
=1-BDP
12
J7-12
NOT USED
NU
J8-1,2,3
0V
J8-4,5,6
+5V
13
J8-7
NOT USED
NU
14
J8-8
NOT USED
NU
15
J8-9
LEAVING LIQUID TEMPERATURE HOT (YCWL units only)
-BLHT
J9-1,2,3,4,7,9
0V
J9-5,6,8
+5V
16
J9-10
SYS 2 SUCTION PRESSURE
=2-BSP
17
J9-11
SYS 2 DISCHARGE PRESSURE
=2-BDP
18
J9-12
NOT USED
NU
J10-1,2,3
0V
J10-4,5,6
+5V
19
J10-7
NOT USED
NU
20
J10-8
NOT USED
NU
21
J10-9
RETURN LIQUID TEMPERATURE HOT (YCWL units, if fitted)
-BEHT
INPUT
-AMB
-ARB
DESCRIPTION
IDENT
J13-1
-XP7-1
+30VDC
1
J13-2
-XP7-2
UNIT SWITCH
-SOA
2
J13-3
-XP7-3
PULSE WIDTH MODULATED TEMPERATURE RESET or
REMOTE UNLOAD STEP 2
PWM
3
J13-4
-XP7-4
REMOTE UNLOAD STEP 1
RU
4
J13-5
-XP7-5
REMOTE START STOP
RP
5
J13-6
-XP7-6
MODE SELECTION
YLAA two speed fan unit fan speed inhibit. (CLOSED: Inhibit)
YCWL Heatpump units (OPEN: cooling. CLOSED: Heating)
MS
6
J13-7
-XP7-7
NOT USED
NU
7
J13-8
-XP7-8
SYS 1 FAULT INPUT
=1-KCR
8
J13-9
-XP7-7
FLOW SWITCH
SF
9
J13-10
-XP7-9
SYS 2 FAULT INPUT
=2-KCR
