AAON R90800 Quick start guide

Full Digital Module
Technical Guide
Factory Packaged Controls
Tulsa

Table of Contents
OVERVIEW........................................................................................................................................................ 3
INSTALLATION AND WIRING ........................................................................................................................... 4
Environmental Requirements.......................................................................................................................................................4
Mounting.......................................................................................................................................................................................4
Power Supply and Communications ............................................................................................................................................4
Important Wiring Considerations..................................................................................................................................................5
VCM-X Modular E-BUS Controller to Full Digital Module Wiring .................................................................................................6
START-UP AND COMMISSIONING.................................................................................................................... 8
General.........................................................................................................................................................................................8
Unit Configurations.......................................................................................................................................................................8
MODES OF OPERATION ................................................................................................................................... 9
Digital Stage 1 / Digital Stage 2....................................................................................................................................................9
Off Mode.......................................................................................................................................................................................9
Cooling Mode ...............................................................................................................................................................................9
Heat Pump Heating Mode (Air to Air)...........................................................................................................................................9
Dehumidification Mode.................................................................................................................................................................9
Defrost Mode................................................................................................................................................................................9
Staging Delays .............................................................................................................................................................................9
TROUBLESHOOTING...................................................................................................................................... 10
Using LEDs to Verify Operation..................................................................................................................................................10
LED Diagnostics.........................................................................................................................................................................12
Suction Pressure Transducer Testing.........................................................................................................................................13
APPENDIX ...................................................................................................................................................... 14
VCM-X Controller to Full Digital Module Wiring .........................................................................................................................14
WattMaster Controls Inc.
8500 NW River Park Drive · Parkville , MO 64152
Toll Free Phone: [phone]
PH: [phone] · FAX: [phone]
E-mail: [e-mail]
Visit our web site at www.orioncontrols.com
WattMaster Form : AA-FDM-TGD-01G
Copyright July 2016 WattMaster Controls, Inc.
AAON Manual Part Number: R84500
AAON®is a registered trademark of AAON, Inc., Tulsa, OK.
Neither WattMaster Controls, Inc. nor AAON®
assumes any responsibility for errors or omissions in this document.
This document is subject to change without notice.
www.aaon.com
PART NUMBER CROSS REFERENCE TABLE
PART DESCRIPTION ORION AAON
VCM-X Full Digital Module OE370-23-FDM-A R74870
VCM-X Modular Controller OE332-23-VCMX-MOD-A R90800
VCM-X Modular E-BUS Controller OE332-23E-VCMX-MOD-A V07150
VCM-X E-BUS Distribution Module OE365-23-EBD-A R82930
VCM-X Expansion Module OE333-23-EM R69190
VCM-X 12 Relay Expansion Module OE358-23-12R R69180
VCM-X One Condenser Head Pressure Module OE370-23-HP1C R74860
VCM-X Two Condenser Head Pressure Module OE370-23-HP2C R90230

Technical Guide 3
Full Digital Module
Overview
The Full Digital Module (OE370-23-FD-A) is a device that enables and
modulates up to four digital compressors on HVAC Units controlled
by the VCM-X Modular Controller (OE332-23-VCMX-MOD-A) or
VCM-X Modular E-BUS Controller (OE332-23E-VCMX-MOD-A).
The Full Digital Module will control the digital compressors to satisfy
the cooling, dehumidification, and heat pump requirements of the VCM-
X Modular series controller.
If the Full Digital Module is in the Cooling Mode or Heat Pump Heat-
ing Mode, it will modulate the compressors to maintain the appropriate
Supply Air Temperature Setpoint. If the module is in the Dehumidifica-
tion Mode, it will modulate compressors to maintain the Coil Suction
Temperature Setpoint. If the module is in the Heat Pump Heating Mode,
the module can also monitor a signal for a Defrost Cycle from the VCM-
X Modular series controller if a One Condenser Head Pressure Module
(OE370-23-HP1C) is also installed.
Module Overview
Figure 1: Full Digital Module
The Full Digital Module is connected to the VCM-X Modular Control-
ler using the E-BUS Distribution Module (OE365-23-EBD). The Full
Digital Module can also be directly connected to the VCM-X Modular
E-BUS Controller. Either connection allows the Full Digital Module
to receive setpoints and monitor the Supply Air Temperature from the
VCM-X Modular series controller. The Full Digital Module requires a
24 VAC power connection with an appropriate VA rating.
NOTE: The Full Digital Module contains no user-serviceable
parts. Contact qualified technical personnel if your
module is not operating correctly.
www.orioncontrols.com
1003
1002
10uF
300
1
2
4
8
SERIAL #
C2
D3
D4
R7
R9
R11
R12
R13
R14
R23
R24
R25
R26
R28
R29
R30
SW1
D12
D13
R53
R54
TB3
C20
R34 R50
SW2
+5V
SIG 2
GND
1003
1002
10uF
1003
1002
10uF
1003
1002
10uF
4751 4751 4751 4751
OFF
OFF
OPTIONS
ALARM
ANALOG
STAT
+5V
COMM
GND
SIG 4
300
GND
BIN 2
R1
4
R2
4
GND
1002
1002
1002
1002
1002
1002
1002
1002
RELAYS
ADDRESS
SIG 3
+5V
GND
BIN 1
COM
+5V
SIG 1
R3
R4
Rc
AO1
AO2
PWM1-
PWM1+
PWM2-
PWM2+
.01uF
PWR

Full Digital Module
Technical Guide
4
Environmental Requirements
The Full Digital Module needs to be installed in an environment which
can maintain a temperature range between -30°F and 150°F and not
exceed 90% RH levels (Non-Condensing).
Mounting
The Full Digital Module is housed in a plastic enclosure. It is designed
to be mounted by using the 3 mounting holes in the enclosure base. It is
important to mount the module in a location that is free from extreme high
or low temperatures, moisture, dust, and dirt. Be careful not to damage
the electronic components when mounting the module.
See Figure 2 for Module dimensions (dimensions are in inches).
Power Supply and Communications
The Full Digital Module is connected to the E-BUS Distribution Mod-
ule with a modular HSSC cable to provide communications from the
VCM-X Modular Controller. The E-BUS Distribution Module uses
WattMaster Control’s standard I2C modular cable to connect with the
VCM-X Modular Controller, VCM-X Expansion Module, or 12-Relay
Expansion Module.
The Full Digital Module can also be directly connected to the VCM-X
Modular E-BUS Controller, bypassing the use of the E-BUS Distribu-
tion Module.
The Full Digital Module requires a 24 VAC power supply with an ap-
propriate VA rating.
WARNING: Observe polarity! All boards must be wired
GND-to-GND and 24 VAC-to-VAC. Failure to
observe polarity could result in damage to the
boards.
Installation and Wiring
5.04
5.64
5.71
2.07
0.55
4.14
0.29
0.18 DIA. TYP.
www.orioncontrols.com
1003
1002
10uF
300
1
2
4
8
SERIAL #
C2
D3
D4
R7
R9
R11
R12
R13
R14
R23
R24
R25
R26
R28
R29
R30
SW1
D12
D13
R53
R54
TB3
C20
R34 R50
SW2
+5V
SIG 2
GND
1003
1002
10uF
1003
1002
10uF
1003
1002
10uF
4751 4751 4751 4751
OFF
OFF
OPTIONS
ALARM
ANALOG
STAT
+5V
COMM
GND
SIG 4
300
GND
BIN 2
R1
4
R2
4
GND
1002
1002
1002
1002
1002
1002
1002
1002
RELAYS
ADDRESS
SIG 3
+5V
GND
BIN 1
COM
+5V
SIG 1
R3
R4
Rc
AO1
AO2
PWM1-
PWM1+
PWM2-
PWM2+
.01uF
PWR
Note: Height is 1.49 inches.
Figure 2: Full Digital Module Dimensions

Technical Guide
Full Digital Module
5
Installation and Wiring
Important Wiring Considerations
Please carefully read and apply the following information when wiring
the Full Digital Module:
1. The 1 to 5 VDC signals for the Copeland Compressor
Speed need to use 18-gauge shielded twisted pair cable, and
the Drain wire must be the GND signal.
2. All 24 VAC wiring must be connected so that all ground
wires remain common. Failure to follow this procedure can
result in damage to the module and connected devices.
3. All wiring is to be in accordance with local and
national electrical codes and specifications.
4. Be sure that all wiring connections are properly inserted
and tightened into the terminal blocks. Do not allow wire
strands to stick out and touch adjoining terminals. This
could potentially cause a short circuit.
5. Be sure all modular wiring harness connectors are seated
firmly in their respective modular connectors on the circuit
board.
NOTE: The Compressor Relays on the Full Digital Module
are used rather than the relay outputs on the VCM-X
Modular series controller.
WARNING: Be sure all controllers and modules are
powered down before connecting or
disconnecting HSSC cables.
Figure 3: Full Digital E-BUS Connection Wiring
SHLD
SHLD
SHLD
OUT
OUT
OUT
COM
COM
COM
EXC
EXC
EXC
P4
P4
P4
BK
BK
BK
RD
RD
RD
WH
WH
WH
P2
P2
P2
P1
P1
P1
P3
P3
P3
P5
P5
P5
C1
C1
C1
C2
C2
C2
P6
P6
P6
SHLD
OUT
COM
EXC
P4
BK
RD
WH
P2
P1
P3
P5
AO1
SIG 1
SIG 2
SIG 3
SIG 4
AO2
GND
GND
GND
GND
C1
C2
P6
+5V
SIG 2
GND
OPTIONS
ALARM
ANALOG
STAT
+5V
COMM
GND
SIG 4
GND
BIN 2
R1
R2
GND
RELAYS
ADDRESS
SIG 3
+5V
GND
BIN 1
COM
+5V
SIG 1
R3
R4
Rc
AO1
AO2
PWM1-
PWM1+
PWM2-
PWM2+
OE275-01 Suction
Pressure Transducer
OE275-01 Suction
Pressure Transducer
OE275-01 Suction
Pressure Transducer
OE275-01 Suction
Pressure Transducer
OE370-23-FD-A
Full Digital Module
Copeland Digital
Compressor Controller B1
Copeland Digital
Compressor Controller A2
Copeland Digital
Compressor Controller A1
Copeland Digital
Compressor Controller B2
If Using One
Module, Set
Addresses To
Off. If Using
Two Modules,
Set Addresses
Consecutively.
This Dip
Switch Is Not
Used For This
Application
PWR
Connect To E-BUS
Distribution Module or
VCM-X Modular E-BUS Controller
Connect To Other
WattMaster-Approved
E-BUS Expansion Module(s)
HSSC Cable
24 VAC Transformer
3 VA Minimum
Line Voltage
24 VAC
GND
WARNING!!
Observe Polarity! All
boards must be wired
with GND-to-GND and
24 VAC-to-24 VAC.
Failure to observe
polarity could result in
damage to the boards.
HSSC Cable
NOTE:
NORMALLY OPEN AND
RATED FOR 24 VAC POWER
ALL RELAY OUTPUTS
ARE
COMPRESSOR A2 ENABLE
COMPRESSOR A1 ENABLE
R1
R4
R3
R2
COMPRESSOR B1 ENABLE
COMPRESSOR B2 ENABLE
ONLY. 1 AMP MAXIMUM LOAD.
HVAC UNIT CONNECTIONS

Full Digital Module
Technical Guide
6
Installation and Wiring
VCM-X Modular E-BUS Controller to
Full Digital Module Wiring
The Full Digital Module directly connects to the VCM-X Modular E-
BUS Controller using a modular HSSC cable. The Full Digital Module
requires a 24 VAC power connection with an appropriate VA rating. See
Figure 4 below for wiring.
Any E-BUS Module can be connected to the E-BUS Controller’s E-BUS
port or can be daisy-chained together using HSSC cables.
NOTE: Contact Factory for the correct HSSC cable length for
your application. Cables are available in ½ and 3 meter
lengths and 100 and 150 foot lengths.
Figure 4: VCM-X Modular E-BUS Controller to Full Digital Module Wiring Diagram
Connect To Other
WattMaster-Approved
E-BUS Expansion Module(s)
HSSC Cable HSSC Cable
Connect To VCM-X E-BUS Controller
OE370-23-FD-A
Full Digital Module
+5V
SIG 2
GND
OPTIONS
ALARM
ANALOG
STAT
+5V
COMM
GND
SIG 4
GND
BIN 2
R1
R2
GND
RELAYS
ADDRESS
SIG 3
+5V
GND
BIN 1
COM
+5V
SIG 1
R3
R4
Rc
AO1
AO2
PWM1-
PWM1+
PWM2-
PWM2+
PWR
24 VAC Transformer
3 VA Minimum
Line Voltage
24 VAC
GND
WARNING!!
Observe Polarity! All boards must be
wired with GND-to-GND and 24 VAC-
to-24 VAC. Failure to observe polarity
could result in damage to the boards.
This Dip Switch Is
Not Used For This
Application
If Using One Module,
Set Addresses To Off.
If Using Two Modules,
Set Addresses
Consecutively.

Technical Guide
Full Digital Module
7
Installation and Wiring
WARNING: Be sure all controllers and modules are
powered down before connecting or
disconnecting HSSC cables.
Figure 4, cont.: VCM-X E-BUS Controller to Full Digital Module Wiring Diagram
Line Voltage
All Comm Loop Wiring Is
Straight Thru
24VAC
GND
Local Loop
RS-485
9600 Baud
See Individual
Component Wiring
Diagrams For
Detailed Wiring Of
Analog Inputs And
For Stand Alone Applications,
Connect To System Manager. For Network
Applications Connect To Next Controller
And/Or MiniLink PD On Local Loop.
G - Fan ON/OFF Only
R - 24VAC
Relay Output Contacts
R2 Through R5 May Be User-Configured
For The Following:
1 - Heating Stages
2 - Cooling Stages
3 - Warm-up Mode Command (VAV Boxes)
4 - Reversing Valve (Air To Air Heat Pumps)
5 - Reheat Control (Dehumidification)
6 - Exhaust Fan Interlock
7 - Preheater For Low Ambient Protection
8 - Alarm
9 - Override
10 - Occupied
11 - OA Damper
12 - Heat Wheel
13 - Emergency Heat
Note: 1.) When Using the HP2C Module,
All Compressors Will Be Wired From the
Protection Module, Not the VCM-X Controller.
Note: A Total Of 20 Relays Are Available By
Adding Relay Expansion Modules. All
Expansion Module Relay Outputs Are User
Configurable As Listed Above.
Connect FRP Tubing To High Pressure
Port (Bottom Tube) and Route To Static
Pressure Pickup Probe Located In Unit
Discharge. Leave Port Marked “Lo” Open
To Atmosphere
OE271
Static Pressure
Transducer
Splice If Required
Connect To
Expansion Module(s)
(When Used)
Connect To Digital Room Sensor And/Or
Digital CO Sensor
2
Warning:
24 VAC Must Be Connected So That All Ground
Wires Remain Common. Failure To Do So Will
Result In Damage To The Controllers.
T to T, R to R & SHLD to SHLD
Size Transformer For Correct
Total Load.
VCM-X Modular Controller = 8
OE332-23E-VCMX-MOD-A
VCM-X Modular
E-BUS Controller
Note:
All Relay Outputs Are Normally Open And
Rated For 24 VAC Power Only.
1 Amp Maximum Load.
AI1 SET AI2 SET AI3 SET AI4 SET AI5 SET AI7 SET
Jumpers
HSSC Cable Connect To
VCM-X E-BUS Port
RELAY CONTACT
RATING IS 1 AMP
MAX @ 24 VAC
RS-485 COMMUNICATION LOOP. WIRE
“R” TO “R”, “T” TO “T” “SHLD” TO “SHLD”
FAN
RELAY 2
RELAY 3
RELAY 4
RELAY 5
RELAY
COMMON
IC DIGITAL
SENSOR
2
IC
EXPANSION
2
STATIC
PRESSURE
ANALOG INPUT JUMPER SETTINGS
MUST BE SET AS SHOWN FOR
PROPER OPERATION
24 VAC POWER ONLY
WARNING! POLARITY MUST BE OBSERVED
OR THE CONTROLLER WILL BE DAMAGED
AI1
AI2
AI3
AI4
THERM
THERM
THERM
THERM
THERM
THERM
4-20mA
4-20mA
4-20mA
4-20mA
4-20mA
4-20mA
0-10V
0-10V
0-10V
0-10V
0-10V
0-10V
0-5V
0-5V
0-5V
0-5V
0-5V
0-5V
AI5
AI7
ANALOG INPUT
JUMPER
SETTINGS
WattMaster Label
#LB102073-01-A
Rev.: 1A
www.aaon.com
www.orioncontrols.com
VCM-X MODULAR E-BUS CONTROLLER
Orion No.:OE332-23E-VCMX-MOD-A
AAON No.:
V07150
AI1 = SPC (SPACE TEMPERATURE SENSOR)
AI2
AI3
AI4
AI5
AI7
A01
A02
= SAT (SUPPLY AIR TEMPERATURE SENSOR)
= RAT (RETURN AIR TEMPERATURE SENSOR)
= OAT (OUTDOOR AIR TEMPERATURE SENSOR)
= SUCTION PRESSURE SENSOR (FROM EXP. MODULE)
= SPACE TEMPERATURE SENSOR SLIDE ADJUST
OR VOLTAGE RESET SOURCE
= ECONOMIZER (2-10 VDC OUTPUT)
= SUPPLY FAN VFD (0-10 VDC OUTPUT)
LED BLINK CODES
LED NAME STATUS1 STATUS2
NORMAL OPERATION 0 1
SAT FAIL 1 2
OAT FAIL 2 2
SPC FAIL 3 2
MODULE ALARM 4 2
MECH COOL FAIL 1 3
MECH HEAT FAIL 2 3
FAN PROOF FAIL 3 3
DIRTY FILTER 4 3
EMERGENCY SHUTDOWN 5 3
LOW SAT 1 4
HIGH SAT 2 4
CONT. TEMP COOL FAIL 3 4
CONT. TEMP HEAT FAIL 4 4
PUSH BUTTON OVR 1 5
ZONE OVR 2 5
OUTPUT FORCE ACTIVE 0 6
E-BUS
CONNECTOR

Full Digital Module
Technical Guide
8
Start Up and Commissioning
General
In order to have a trouble free start-up, it is important to follow a few
simple procedures. Before applying power for the first time, it is very
important to run through a few simple checks.
One of the most important checks to make before powering up the system
for the first time is to make sure that the VCM-X Modular or VCM-X
Modular E-BUS Controller is configured properly for your application.
Refer to the VCM-X Controller Technical Guide or VCM-X Modular
E-BUS Controller Technical Guide for more information. A handheld
Modular Service Tool, Modular System Manager, or System Manager
Touch Screen connected to the VCM-X Modular or VCM-X Modular
E-BUS Controller will allow you to configure your application. Refer to
the VCM-X / RNE Operator’s Interfaces SD Technical Guide or System
Manager TS II Technical Guide for more information.
Check all wiring leads at the terminal block for tightness. Be sure that
wire strands do not stick out and touch adjacent terminals. Confirm
that all sensors required for your system are mounted in the appropriate
location and wired into the correct terminals.
WARNING: Observe polarity! All boards must be wired
GND-to-GND and 24 VAC-to-VAC. Failure to
observe polarity could result in damage to the
boards.
Table 1: Unit Configurations Chart
UNIT CONFIGURATIONS
PERMUTATION
SYSTEM A SYSTEM B
HARDWARE VCM-X WSHP
CONFIGURATION
Comp A1 Comp A2 Comp B1 Comp B2
Relay 1 Relay 2 Relay 3 Relay 4
1 On/Off On/Off Use VCM-X Modular
Series Controller Only 2 Compressors
2 Digital On/Off Use VCM-X Modular
Series Controller Only
2 Compressors
Digital Compressor
3 Digital Digital
Use VCM-X Modular
Series Controller and
Full Digital Module
2 Compressors
Full Digital
4 On/Off On/Off On/Off On/Off Use VCM-X Modular
Series Controller Only 4 Compressors
5 Digital On/Off On/Off On/Off Not Available Not Available
6 Digital On/Off Digital On/Off Use VCM-X Modular
Series Controller Only
4 Compressors
Digital Compressor
7 Digital Digital Digital Digital
Use VCM-X Modular
Series Controller and
Full Digital Module
4 Compressors
Full Digital
In the Cooling Mode, the Compressors will stage in the following order:
Permutations 1, 2 & 3: Compressor A1 -> Compressor A2
Permutations 4: Compressor A1 -> Compressor A2 -> Compressor B1 -> Compressor B2
Permutations 6: Compressor A1 & Compressor A2 -> Compressor B1 -> Compressor B2
Permutations 7: Compressor A1 & Compressor A2 -> Compressor B1 & Compressor B2
In the Dehumidification Mode, the Compressors will stage in the following order:
Permutation 4: Compressor A1 & Compressor A2 -> Compressor B1 -> Compressor B2
All other permutations in the Dehumidification Mode stage as described in the Cooling Mode.

Technical Guide
Full Digital Module
9
Modes of Operation
NOTE: See Unit Configurations Chart on page 10 for more
information about compressor staging.
Digital Stage 1 / Digital Stage 2
On units with two Digital Scroll Compressors, the first compressor (A1)
will be designated as Digital Stage 1 and the second compressor (A2)
will be designated as Digital Stage 2.
On units with four Digital Scroll Compressors, there may be instances
where compressor numbers on the module do not correlate with the
mechanical compressors’ numbers. Therefore, Digital Stage 1 refers to
the first set of Digital Scroll Compressors (A1/B1) that will stage on
together and Digital Stage 2 refers to the second set of Digital Scroll
Compressors (A2/B2) that will stage on together. Please refer to AAON’s
wiring diagram for specific wiring of the unit.
Off Mode
The Full Digital Module will be in the Off Mode when no signal is
being received from the VCM-X Modular series controller to run the
compressors.
Cooling Mode
When a Cool Signal is received, the Full Digital Module will go into
Cooling Mode. At this point, Compressor A1 (and B1*) will energize and
Digital Stage 1 Analog Output will modulate as necessary to maintain
the Supply Air Temperature at the Active Supply Air Setpoint that is
broadcast from the VCM-X Modular series controller.
When Digital Stage 1 reaches 100%, a stage up timer is started. If Digital
Stage 1 stays at 100% for the Stage Up timer, Compressor A2 (and B2*)
will energize and both Digital Stage 1 and Digital Stage 2 outputs will
go to 50% and begin to modulate together.
If both systems are energized and they go below 30% and the SupplyAir
is below the Supply Air Setpoint by the Cooling Stage Window value,
the stage down timer is started. If the systems remain below 30% for
the duration of the stage down timer, Digital Stage 2 will deactivate and
Digital Stage 1 will go to 60%. Digital Stage 1 will stage down if it is
at 0% for the duration of the stage down timer.
* If configured for 4 modulating compressors.
Heat Pump Heating Mode (Air to Air)
Heating Mode works the same as Cooling Mode except the Reversing
Valve is switched and the sequence is opposite. Compressors modulate
up when below the Heating Supply Air Setpoint and modulate down
when above the setpoint.
Dehumidification Mode
In Dehumidification Mode, compressors will be controlled to maintain
the Suction Pressure Temperature Setpoint. Digital Stage 1—Com-
pressor A1 (and B1*) will modulate up to 100% before Digital Stage
2—Compressor A2 (and B2*) can be energized. When Digital Stage 2
is energized, Digital Stage 1 will be locked at 100%.
* If configured for 4 modulating compressors.
Defrost Mode
In Defrost Mode, if only Digital Stage 1 is energized, it will go to 100%
and the reversing valve will deactivate. If both Digital Stage 1 & Digital
Stage 2 are energized, they will both go to 100% and the reversing valve
will be deactivated. The duration for Defrost Mode is determined by the
VCM-X Modular series controller.
NOTE: Defrost Mode is only available if a One Condenser or
Two Condenser Head Pressure Module is installed.
Staging Delays
Staging Delays minimum run times and minimum off times are sent
from the VCM-X Modular series controller.

Full Digital Module
Technical Guide
10
Using LEDs to Verify Operation
The Full Digital Module is equipped with LEDs that can be used to verify
operation and perform troubleshooting. There are LEDs for communi-
cation, operation modes, and diagnostic codes. The module has seven
LEDs—one used for power, one used for operation status, one used for
alarms, and four used for the compressor relays. See Figure 5 for the
LED locations. The LEDs associated with these inputs and outputs al-
low you to see what is active without using a voltmeter. The LEDs and
their uses are as follows:
Status LEDs
“COMM” - The COMM LED lights up to indicate Communications
between the module and the VCM-X Modular series controller. If Com-
munications are established, the COMM LED will blink.
“ALARM” - This is the diagnostic blink code LED. It will light up
and blink out diagnostic codes. See Table 2 for Diagnostic Blink Code
descriptions. The blink code descriptions are also located on the mod-
ule’s front cover.
No. of Blinks Status
0 No Problems
1 Low Suction Pressure Compressor A1
2 Low Suction Pressure Compressor A2
3 Low Suction Pressure Compressor B1
4 Low Suction Pressure Compressor B2
5 Pressure Sensor A1 Not Detected
6 Pressure Sensor A2 Not Detected
7 Pressure Sensor B1 Not Detected
8 Pressure Sensor B2 Not Detected
9 No Communication
Table 2: ALARM LED Blink Codes
Troubleshooting
“STAT” - This is the status blink code LED. It will light up and every 10
seconds will blink the status mode that the module is currently operating
under. See Table 3 for Status Blink Code code descriptions. The blink
code descriptions are also located on the module’s front cover.
No. of Blinks Status
1 Off Mode
2 Cool Mode
3 Heat Mode
4 Dehumidify Mode
5 Defrost Mode
Table 3: STAT LED Blink Codes

Technical Guide
Full Digital Module
11
Compressor LEDs
“R1” - This LED will light up when Compressor A1 is enabled and will
stay lit as long as Compressor A1 is active.
“R2” - This LED will light up when Compressor A2 is enabled and will
stay lit as long as Compressor A2 is active.
“R3” - This LED will light up when Compressor B1 is enabled and will
stay lit as long as Compressor B1 is active.
“R4” - This LED will light up when Compressor B2 is enabled and will
stay lit as long as Compressor B2 is active.
SERIAL #
D3
D4
R11
R12
R28
R29
R30
D12
D13
R53
R54
TB3
C20
R34 R50
SW2
4751 4751 4751 4751 OFF
OPTIONS
ALARM
STAT
COMM
1002
1002
1002
1002
RELAYS
ANALOG
R1
R2
R3
R4
Rc
AO1
AO2
GND
PWM1-
PWM1+
PWM2-
PWM2+
.01uF


Figure 5: LED Locations
Troubleshooting

Full Digital Module
Technical Guide
12
LED Diagnostics
“PWR” LED: When the Full Digital Module is powered up, the PWR
LED (located below the address switches) should light up and stay on
continuously. If it does not light up, check to be sure that the power wir-
ing is connected to the board, the connections are tight, and the VCM-X
Modular series controller is powered. If after making all these checks,
the PWR LED does not light up, the module is probably defective.
“COMM” LED: The COMM LED lights up to indicate Communica-
tions between the module and the VCM-X Modular series controller. If
the COMM LED does not blink, then communications have not been
established. Check the connection between the VCM-X Modular Con-
troller, the VCM-X Modular E-BUS Controller, the E-BUS Distribution
Module, and the Full Digital Module.
“STAT” LED: As previously described, this LED will blink out the
operation mode that the Full Digital Module is operating under. When
the board is first powered up, the STAT LED will do the following:
 Light up
 Blink out status code every ten seconds to indicate
controller status
“ALARM” LED: As previously described, this LED will blink on and
off to indicate alarms and diagnostics.
Troubleshooting
Other Checks
NOTE: The Full Digital Module contains no user-serviceable
parts. Contact qualified technical personnel if your
module is not operating correctly.

Technical Guide
Full Digital Module
13
Troubleshooting
OE275-01 Suction Pressure Transducer
Testing for R410A Refrigerant
The Evaporator Coil Temperature is calculated by converting the Suc-
tion Pressure to Temperature. The Suction Pressure is obtained by using
the OE275-01 Suction Pressure Transducer, which is connected into the
Suction Line of the Compressor.
Use the voltage column to check the Suction Pressure Transducer while
connected to the Full Digital Module. Read voltage with a meter set on
DC volts. If the temperature/voltage or pressure/voltage readings do
not align closely with the chart, your Suction Pressure Transducer is
probably defective and will need to be replaced.
See the OE275-01 Suction Pressure Transducer, Pressure, Temperature,
and Voltage Chart for R410A Refrigerant testing (Table 4). The chart
shows a temperature range from 20°F to 80°F. For troubleshooting pur-
poses, the DC Voltage readings are also listed with their corresponding
temperatures and pressures.
Table 4: Coil Pressure/Voltage/Temp for OE275-01
Suction Pressure Transducers - R410A Refrigerant
OE275-01 Suction Pressure Transducer Coil Pressure
– Temperature – Voltage Chart for R410A Refrigerant
Temperature
°F
Pressure
PSI
Signal
DC Volts
Temperature
°F
Pressure
PSI
Signal
DC Volts
21.19 80.94 1.8 59.03 168.10 3.2
24.49 87.16 1.9 61.17 174.32 3.3
27.80 93.39 2.0 63.19 180.55 3.4
30.99 99.62 2.1 65.21 186.78 3.5
33.89 105.84 2.2 67.23 193.00 3.6
36.80 112.07 2.3 69.24 199.23 3.7
39.71 118.29 2.4 71.15 205.46 3.8
42.30 124.52 2.5 72.95 211.68 3.9
44.85 130.75 2.6 74.76 217.91 4.0
47.39 136.97 2.7 76.57 224.14 4.1
49.94 143.2 2.8 78.37 230.36 4.2
52.23 149.42 2.9 80.18 236.59 4.3
54.50 155.65 3.0
56.76 161.88 3.1

Full Digital Module
Technical Guide
14
Connect To
E-BUS
Distribution
Module
Line Voltage
24 VAC
GND
Line Voltage
All Comm Loop Wiring Is
Straight Thru
24VAC
GND
Local Loop
RS-485
9600 Baud
See Individual Component
Wiring Diagrams For
Detailed Wiring Of Analog
Inputs And Outputs
For Stand Alone Applications,
Connect To System Manager.
For Network Applications
Connect To Next Controller
And/Or MiniLink PD On Local Loop.
G - Fan ON/OFF Only
R - 24VAC
Relay Output Contacts
R2 Through R5 May Be User-Configured
For The Following:
1 - Heating Stages
2 - See Note 1 Below
3 - Warm-up Mode Command (VAV Boxes)
4 - Reversing Valve (Air To Air Heat Pumps)
5 - Reheat Control (Dehumidification)
6 - Exhaust Fan Interlock
7 - Preheater For Low Ambient Protection
8 - Alarm
9 - Override
10 - Occupied
11 - OA Damper
12 - Heat Wheel
13 - Emergency Heat
Note: 1.) When Using the HP2C Module,
All Compressors Will Be Wired From the
Protection Module, Not the VCM-X
Controller.
2.) A Total Of 20 Relays Are Available By
Adding Relay Expansion Modules. All
Expansion Module Relay Outputs Are User-
Configurable As Listed Above.
Connect FRP Tubing To High Pressure
Port (Bottom Tube) and Route To Static
Pressure Pickup Probe Located In Unit
Discharge. Leave Port Marked “Lo” Open
To Atmosphere
OE271
Static Pressure
Transducer
Splice If Required
Connect To E-BUS Distribution Module
or Expansion Module(s) (When Used)
Connect To Digital Room Sensor And/Or
Digital CO Sensor
2
Warning:
24 VAC Must Be Connected So That All Ground
Wires Remain Common. Failure To Do So Will
Result In Damage To The Controllers.
T to T, R to R & SHLD to SHLD
Size Transformer For
Correct Total Load.
VCM-X Modular Controller
= 8 VA
OE332-23-VCMX-MOD-A
VCM-X Modular Controller Note:
All Relay Outputs Are Normally Open And Rated
For 24 VAC Power Only.
1 Amp Maximum Load.
AI1
AI1 SET AI2 SET AI3 SET AI4 SET AI5 SET AI7 SET
AI2
AI3
AI4
AI5
AI7
AI1 SET AI2 SET AI3 SET AI4 SET AI5 SET AI7 SET
Jumpers
Figure 6: VCM-X Modular Controller Connection to Full Digital Module
Appendix
VCM-X Modular Controller to Full
Digital Module Wiring
When using the VCM-X Modular Controller, the E-BUS Distribution
Module is required ot connect to the Full Digital Module. The Full Digital
Module connects to the E-BUS Distribution Module using a modular
HSSC cable. The Full Digital Module requires a 24 VAC power con-
nection with an appropriate VA rating.
The E-BUS Distribution Module connects to the VCM-X Modular
Controller, VCM-X Expansion Module, or 12 Relay Expansion Module
using the I2C port. See Figure 6 below for wiring.
Any E-BUS module can be connected to each of the four E-BUS Dis-
tribution Module’s output ports or can be daisy-chained together using
HSSC cables.
If using a spliced terminal connection for longer runs, one module can be
connected to the E-BUS Distribution Module and any additional modules
would be daisy-chained to the first module. For more information, refer
to the E-BUS Distribution Module Technical Guide.

Technical Guide
Full Digital Module
15
Appendix
NOTE: Contact Factory for the correct HSSC cable length for
your application. Cables are available in ½ and 3 meter
lengths and 100 and 150 foot lengths.
WARNING: Be sure all controllers and modules are
powered down before connecting or
disconnecting HSSC cables.
Figure 6: VCM-X Modular Controller Connection to Full Digital Module
WARNING!!
Observe Polarity! All
boards must be wired with
GND-to-GND and 24 VAC-
to-24 VAC. Failure to
observe polarity could
result in damage to the
boards.
OE365-23-EBD E-BUS
Distribution Module
GND
-COMM
SHLD
+COMM
INPUT
+COMM
SHLD
-COMM
GND
+VDC
485 DRV
24VAC
GND
PWR
YS102308
REV 1
I2C TO COMM
DIST. BOARD
OUTPUT
Modular Cable
Connect To
VCM-X Modular Controller HSSC Cable
Connect To E-BUS
Distribution Module
Connect To Other
WattMaster-Approved
E-BUS Expansion Module(s)
OE370-23-FD-A
Full Digital Module
+5V
SIG 2
GND
OPTIONS
ALARM
ANALOG
STAT
+5V
COMM
GND
SIG 4
GND
BIN 2
R1
R2
GND
RELAYS
ADDRESS
SIG 3
+5V
GND
BIN 1
COM
+5V
SIG 1
R3
R4
Rc
AO1
AO2
PWM1-
PWM1+
PWM2-
PWM2+
PWR
HSSC Cable
24 VAC Transformer
3 VA Minimum
Line Voltage
24 VAC
GND
WARNING!!
Observe Polarity! All boards must
be wired with GND-to-GND and 24
VAC-to-24 VAC. Failure to observe
polarity could result in damage to
the boards.
If Using One
Module, Set
Addresses To
Off. If Using
Two Modules,
Set Addresses
Consecutively.
This Dip
Switch Is Not
Used For This
Application

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Ph: [phone] • Fax: [phone]
AAON®Manual Part No. R84500
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