QUANTUM™ HD UNITY SYSTEM CONTROLLER
MAINTENANCE
090.670-M (APR 2020)
Page 31
TEST FUSE HERE.
IF LAMP LIGHTS
SPARE FUSE
P8
D8
1
5A
5A
5A
5A
5A
5A
5A
5A
5A
5A
F7
F8
F9
F10
F3
F2
F1
F4 F5
F6 F11
F12
F13
F15
F14
F17
F16
F18
F23 F22
F21
F24
F19
F20
SERIAL #
REVISION
PROGRAM EPROM
DIO
I/O COMMUNICATION
ACTIVITY LAMPS
ACTIVE
MICROPROCESSOR
WATCHDOG LAMP
M7
D7
M8
M9
M10
D10
M3
M2
M1
D1
M4
D4
M5
D5
M6
M11
M12
D12
M13
D13
M15
M14
M17
D17
M16
M18
D18
M23
D23
M22
D22
M21
D21
M24
D24
M19
D19
M20
D20
AMP794068-1
POWER
ON
D29
+12 VOLTS
-12 VOLTS
GND
-RX / -TX
+RX / +TX
BOARD DC POWER
I/O COMMUNICATIONS
+5 DC
U8
P7
FUSE POSITION DETERMINES
INPUT OR OUTPUT
DIGITAL I/O BOARD
NOTE: ALL OUTPUTS ARE RATED FOR A
MAXIMUM 2 AMP LOAD.
NOTE: DIGITAL BOARD 1 REPRESENTS
THE FIRST DIGITAL BOARD IN EACH
REMOTE I/O PANEL.
Liquid (Zone A)
Sucon (Zone A)
HOT
NEUTRAL
Hot Gas (Zone A)
Bleed (Zone A)
Fan (Zone A)
So Hot Gas (Zone A)
HOT
NEUTRAL
Defrost Iniate (Zone A)
Fan Aux. (Zone A)
P5
P4
P2
P1
P3
P6
INPUT MODULE
INPUT MODULE
OUTPUT MODULE
OUTPUT MODULE
OUTPUT MODULE
OUTPUT MODULE
OUTPUT MODULE
OUTPUT MODULE
OUTPUT MODULE
OUTPUT MODULE
OUTPUT MODULE
OUTPUT MODULE
OUTPUT MODULE
INPUT MODULE
OUTPUT MODULE
OUTPUT MODULE
INPUT MODULE
OUTPUT MODULE
INPUT MODULE
OUTPUT MODULE
OUTPUT MODULE
INPUT MODULE
OUTPUT MODULE
OUTPUT MODULE
OUT
OUT
OUT
OUT
OUT
IN IN
OUT
OUT
IN
OUT
IN
IN
OUT
IN
IN
OUT
IN
IN
OUT
OUT
IN
IN
OUT
IN
OUT
IN
IN
IN
OUT
OUT
IN
OUT
IN
IN
OUT
OUT
IN
OUT
IN
INPUT MODULE
INSTALLED
FUSE
5A
FUSE
SPARE
FUSE
FUSE TESTER
AMP794068-1
OUTPUT MODULE
COMMUNICATIONS JUMPERS
DIPSWITCH SETTINGS SIGNIFY
BOARD IDENTIFICATION NUMBER
DP1
J7
J8
J9
J10
Liquid (Zone B)
Sucon (Zone B)
HOT
NEUTRAL
Hot Gas (Zone B)
Bleed (Zone B)
Fan (Zone B)
So Hot Gas (Zone B)
HOT
NEUTRAL
Defrost Iniate (Zone B)
Fan Aux. (Zone B)
Liquid (Zone C)
Sucon (Zone C)
HOT
NEUTRAL
Hot Gas (Zone C)
Bleed (Zone C)
Fan (Zone C)
So Hot Gas (Zone C)
HOT
NEUTRAL
Defrost Iniate (Zone C)
Fan Aux. (Zone C)
Figure 17: Evaporator digital board 1
Diagrams