123
PD4 EXV BOARD (P COMPRESSOR ONLY) — See
Fig. 64. The PD4 EXV board communicates with the master
CCM board through an RS-485 port. It provides input/output
for both the main condenser EXV and optional economizer
EXV, as well as the economizer gas temperature. Dip switch
settings are shown in Fig. 64.
During communication a green activity LED will be dis-
played, and a red LED will blink during normal operation at a
1-second-on, one-second-off frequency (0.5 Hz).
PD4 AUX1 BOARD (P COMPRESSOR ONLY) — See
Fig. 65. The AUX1 board communicates through RS-485 (J9)
with the PD4 EXV board and the master CCM board. It pro-
vides input/output for the condenser liquid sensor. Dip switch
settings are shown in Fig. 65.
The red LED indicates the AUX1 board status as follows:
The green LED lights every time the AUX board transmits
a message, so the frequency of the green LED is consistent
with the frequency of transmitted messages.
DPI RIBBON
CABLE CONNECTOR
A32
TERMINAL BLOCK
NODE ADDRESS
TENS DIGIT = 0
(DO NOT
CHANGE)
DATA
RATE = PGM
(DO NOT
CHANGE)
NODE ADDRESS
ONES DIGIT = 1
(DO NOT CHANGE)
NOTE: If all status indicators are off, the Gateway is not receiving power.
Fig. 63 — Gateway Status LEDs
NUMBER
STATUS
INDICATOR
DESCRIPTION
1 DRIVE DPI Connection Status
2 MS Module Status
3 NET A Serial Communication Status
4 NET B Serial Communication Traffic Status
a23-1618
RED LED
CONDITION
AUX BOARD SOFTWARE STATUS
Off continuously Board unpowered or power supply defective
On continuously Board is powered but board microcontroller is
inactive or defective
Flashing (1 sec-
ond on, 1 sec-
ond off, 0.5 Hz)
Board is operating with correct board microcon-
troller operation
Flashing at any
other frequency
Board is operating defectively
DIP SWITCH
SETTINGS
J4
COMMUNICATION
J3
ECONOMIZER GAS
TEMPERATURE
J2B
CONDENSER EXV
J2A
ECONOMIZER EXV
J1
24 VAC
LED
LIGHTS
a23-1721
ON
1 2 3 4 5 6 7 8
A23-1721
Fig. 64 — PD4 EXV Board (P Compressor Only)
516
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