24
RSMD Technical Guide
TROUBLESHOOTING
LED Diagnostics
Using RSMD LEDs To Verify Operation
The RSMD is equipped with LEDs that can be used to verify
operation and perform troubleshooting. There are LEDs for
communication, operation modes, and diagnostic codes. See
Figure 5, this page
for the LED locations. The LEDs associated
with these inputs and outputs allow you to see what is active
without using a voltmeter. The LEDs and their uses are as follows:
Diagnostic LEDs
STATUS
- If the software is running, this LED should blink at a
rate of 1 blink per second.
ALARM (on board)
- If the module does not receive
communications for more than 1 minute, this LED will light up,
the relays will turn off, and the Analog Outputs will go to 0 VDC.
ALARM (above LCD display)
- This red LED will light up and
stay lit when there is an alarm present. The type of alarm will
display on the LCD display. The ALARM LED also blinks when
the expansion valve is initializing at startup.
COMM
- Every time the module receives a valid E-BUS request
from the VCCX2 Controller, this LED will blink on and then
off, signifying that it received a valid request and responded.
POWER
- This LED will light up to indicate that 24 VAC power
has been applied to the controller.
Binary Input LEDs
BIN1
- This green LED will light up when Compressor Status
1 contact is closed.
BIN2
- This green LED will light up when Compressor Status
2 switch is closed.
BIN3
- This green LED will light up when the Outside Coil
Temperature switch is closed.
BIN4
- This green LED will light up when the Emergency
Shutdown switch is closed.
Relay LEDs
RLY1 - RLY5
- These green LEDs will light up when the relays
are enabled and will stay lit as long as they are active.
Digital Compressor LEDs
COMP1
- This green LED will light up when Digital Compressor
1 is unloading.
COMP2
- This green LED will light up when Digital Compressor
2 is unloading.
RSMD2R
ALARM
UP
DOWN
ENTER
MENU
AAON P/N: ASM02201
+24
V
A
C
GND
RELAY CONTACT
MAX @ 24 VAC
RATING IS 1 AMP
CONDENSER 1
COMP 1
COMP 2
ANALOG OUT
REVERSING VALVE
COMMON
RELAY OUTPUT
TERMINALS
LABEL P/N:
G041660
COND 1
COND 2
GND
24 VAC
POWER ONLY
WARNING!
POLARITY
MUST BE
OBSERVED
OR THE
CONTROLLER
WILL BE
DAMAGED
CONDENSER 2
HEAD PRES 1
+5 V
+5 V
COMP DIS 1
COMP 1
SP-1
HP-1
COMP DIS 2
COMP 2
GND
GND
OA COIL / POWF
EMER SHDN
GND
LEAVING H20
GND
SUCTION PRES 2
HEAD PRES 2
+5 V
+5 V
SP-2
HP-2
GND
GND
R+
SHD
T-
E-BUS
R+ SHD T-
DUAL E-BUS
EXPANSION
RSM FOR DIGITAL COMPRESSORS
www.aaon.com
SUCTION PRES 1
Figure 5: RSMD LED Locations
Summary of Contents for RSMD
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