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M2 unit controller LED indicators
Some indicators on the circuit board are visible with the cover in place; others are not. The indicators and their meanings are
described in table 1.
Table 1. LED operation indications
LED Status Indication Meaning
Heartbeat
GREEN SLOW FLASH NORMAL OPERATION
GREEN FAST FLASH CHECK 24V, UPDATE FIRM-
WARE, OR REPLACE
BOARD
UNLIT STEADY OFF NO VOLTAGE TO M2 BOARD
OR DEFECTIVE BOARD
GREEN STEADY ON DEFECTIVE BOARD (RE-
PLACE)
OAS
GREEN STEADY ON OUTSIDE AIR IS SUITABLE
GREEN FLASHING
IAQ MODE OR MECHANI-
CAL COOLING DURING
FREE COOLING
PC
Connection
LOCAL
(YELLOW)
FLICKERING ON
COMMUNICATION TO PC
USB CONNECTOR
NETWORK
(GREEN)
FLICKERING ON
NETWORK COMMUNICA-
TION
S−BUS
BUS (GREEN) FLICKERING ON
NETWORK TRAFFIC PRES-
ENT
TX (YELLOW) FLICKERING ON M2 IS TRANSMITTING
BACnet
(option)
RX (GREEN) FLICKERING ON M2 IS RECEIVING
TX (YELLOW) FLICKERING ON M2 IS TRANSMITTING
LED Status Indication Meaning
LonTalk
(option)
RX (GREEN) FLICKERING ON M2 IS RECEIVING
TX (YELLOW) FLICKERING ON M2 IS TRANSMITTING
SERVICE
(RED)
FLASHING 1 SEC.
ON; 1 SEC. OFF
NODE IS NOT CONFIG-
URED; APPLICATION
LOADED
SERVICE
(UNLIT)
STEADY OFF
NODE IS COMPLETELY
CONFIGURED
SERVICE
(RED)
CONSTANT ON
NODE IS CONFIGURED; NO
APPLICAITON LOADED
SERVICE
(RED)
QUICK FLASHES
DURING
INITIALIZATION
MESSAGES BEING PASSED
TO M2; NORMAL OPERA-
TION
Thermostat
Input
YELLOW INDICATES A
THERMOSTAT
DEMAND
G− BLOWER ON
W1− 1ST STAGE HEAT
W2− 2ND STAGE HEAT
Y1− 1ST STAGE COOL
Y2− 2ND STAGE COOL
OCP− OCCUPIED
Thermostat LEDs indicate only with incoming thermostat connection
vis SmartWire connector.
Slow Flash = 1 sec on; 1 sec off.
Fast Flash = 1 msec on; 1 msec off.
A flickering" LED flashes significantly faster than a fast flash.
NOTE − LEDs are energized by 24 vac thermostat inputs.
Startup
Connections between RTU & M2 unit controller
The M2 unit controller connects to the rooftop unit using
SmartWire connectors. Each connector is keyed" so
that no connector can be installed in the wrong location. Be
sure all connectors are in place and completely inserted
(see figure 1).
Sensor Common Isolation
Thermostat (TSTAT) and humidity (HUM) sensor com-
mons may be isolated if they are powered remotely. Slide
switch to OPEN to isolate (see figure 1).
USB interface usage
The USB port is used for verifying service, downloading re-
ports, and transferring unit profiles. Onsite data collection
requires use of a USB flash drive. Data written to the drive
includes date, time, serial number, catalog number, basic
data, error code buffer, and unit configuration.
PC interface
The PC interface is used with unit controller software to
change programming. The M2 interface uses a USB A to B
male cable. You may also use a 9 pin/RS485 connection to
the phone jack or S−BUS connector. A list of service con-
nection kits is on Page 20.
SmartWire Field Wiring Connections
The SmartWire connectors, P297, P298 and P299, al-
low for easy field wiring connection points.
2−amp fuseThe 24VAC supply outputs, (R), on these
connectors are routed through the fuse, F1. This fuse is a
standard 2−amp, automotive−style blade fuse. This fuse
protects the Prodigy controller from field wiring mis−wires.
TSTAT COMThe switch "TSTAT COM" is located to the
left of P297. This switch is used only in unique situations
where the device supplying the thermostat signals to the
Prodigy controller has its own power source and does
not share a common reference voltage with the Prodigy
controller. Otherwise the TSTAT COM switch needs to be
set to the default, closed position, to the right.
HMD COMThe switch "HMD COM" is located to the right
of P299. This switch is used only in unique situations
where the device supplying the dehumidify command sig-
nal to the Prodigy controller has its own power source
and does not share a common reference voltage with the
Prodigy controller. Otherwise the HMD COM switch
needs to be set default, closed position, to the left.
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