Operating instructions

19
Table 12 — Hot Gas Bypass/Pump Board Inputs and Outputs
Local Equipment Network — Information is trans-
mitted between modules via a 3-wire communication bus or
LEN (Local Equipment Network). External connection to the
LEN bus is made at TB3.
Board Addresses — All boards (except the Main Base
Board and Energy Management Module Board) have
8-position DIP switches.
Touch Pilot™ Display — The Touch Pilot display port
connections are shown in Table 13. Wiring is shown in Fig. 15.
Control Module Communication
RED LED — Proper operation of the control boards can be
visually checked by looking at the red status LEDs (light-
emitting diodes). When operating correctly, the red status
LEDs will blink in unison at a rate of once every 2 seconds. If
the red LEDs are not blinking in unison, verify that correct
power is being supplied to all modules. Be sure that the Main
Base Board (MBB) is supplied with the current software. If
necessary, reload current software. If the problem still persists,
replace the MBB. A red LED that is lit continuously or blink-
ing at a rate of once per second or faster indicates that the board
should be replaced.
GREEN LED — All boards have a green LEN (SIO) LED
which should be blinking whenever power is on. If the LEDs
are not blinking as described check LEN connections for
potential communication errors at the board connectors. See
Input/Output Tables 3-12 for LEN connector designations. A
3-wire bus accomplishes communication between modules.
These 3 wires run in parallel from module to module. The J9A
connector on the MBB provides communication directly to the
Navigator™ display module.
YELLOW LED — The MBB has one yellow LED. The
Carrier Comfort Network
®
(CCN) LED will blink during times
of network communication.
DESCRIPTION INPUT/OUTPUT I/O TYPE DISPLAY MODULE POINT NAME
CONNECTION POINT
Pin Notation
Power (24 vac supply)
—— — HGBP/PMP-J1
11 24 vac
12 Ground
Local Equipment Network
—— — HGBP/PMP-J9
+ RS485 Port (D+)
G RS485 Port (Gnd)
- RS485 Port (D-)
Circuit A Minimum Load Control MLV-A Solenoid Valve Hot Gas Bypass A Output, HGB.A HGBP/PMP-J2-CH3
Circuit B Minimum Load Control MLV-B Solenoid Valve Hot Gas Bypass B Output, HGB.B HGBP/PMP-J2-CH4
Circuit C Minimum Load Control MLV-C Solenoid Valve Hot Gas Bypass C Output, HGB.C HGBP/PMP-J2-CH5
Pump #1 Starter PMP1 Contactor Water Exchanger Pump 1, PMP.1 HGBP/PMP-J2-CH1
Pump #2 Starter PMP2 Contactor Water Exchanger Pump 2, PMP.2 HGBP/PMP-J2-CH2
1
2
3
4
5
6
7
8
ON
100K
100K
100K
LOCATION OF
SERIAL NUMBER
TB1 TB2 TB3 TB4 TB5 TB6 TB7 TB8
CH1 CH2 CH3 CH4 CH5 CH6 CH7 CH8
STATUS SIO (LEN)
24 VAC
J1
J9
D4
U2
U5
Q2
Q7
Q3
U8
U9
Q9
Q10
Q11Q12
Q13
J4
J3
J2
S1
D7
Q5
Y1
D5
D6
L2
U6
U1
Q1
D3
C3
3 2 1
– G +
3 2 1
– G +
DIP SWITCH
Fig. 14 — Hot Gas Bypass/Pump Board
a30-4047