Control Modules; Red Led; Green Led - Carrier Ecologic Series 3 Controls, Start-Up, Operation, Service, And Troubleshooting

COMPRESSOR A2
(206-271 ONLY)
3
1
1 DISCHARGE PRESSURE
2
SUCTION PRESSURE
COMP A2
(205-265 ONLY)
3
4
1
1 DISCHARGE PRESSURE
2
SUCTION PRESSURE

Control Modules

Turn controller power off before servicing controls. This
ensures safety and prevents damage to controller.
PROCESSOR MODULE (PSIO-1), COMPRESSOR PRO-
TECTION MODULE (CPM), HIGH-VOLTAGE RELAY
MODULE (DSIO-HV), AND EXV DRIVER MODULE
(DSIO-EXV), 12/6 MODULE (PSIO-2) — The PSIO and
DSIO modules all perform continuous diagnostic evaluations
of the condition of the hardware. Proper operation of these
modules is indicated by LEDs on the front surface of the
DSIOs, and on the top horizontal surface of the PSIOs.
RED LED — Blinking continuously at a 1 to 2 second rate
indicates proper operation. Lighted continuously indicates a
problem requiring replacement of module. Off continuously
indicates power should be checked. If there is no input power,
check fuses. If fuse is bad, check for shorted secondary of
transformer, tripped circuit breaker or bad module. On the
PSIO module, if the light is blinking at a rate of twice per sec-
ond, the module should be replaced.
GREEN LED — On a PSIO module, this is the green LED
closest to COMM connectors. The other green LED on mod-
ule indicates external communications, when used. Green LED
should always be blinking when power is on. It indicates mod-
ules are communicating properly. If green LED is not blinking,
COMPRESSOR A1
4
3
2
3 OIL PRESSURE
4
ECONOMIZER PRESSURE (LOCATED IN MOTOR COOLING LINE)
Fig. 24A — 30HX Pressure Transducer Locations
COMP B2
COMP A1
(281-350 ONLY)
3 3
2
2
1
3
OIL PRESSURE
4
ECONOMIZER PRESSURE (LOCATED IN MOTOR COOLING LINE)
Fig. 24B — 30GX Pressure Transducer Locations
COMPRESSOR B1
4
3
2
1
COMP B1
3
4
COOLER
check red LED. If red LED is normal, check module address
switches. Correct addresses are as follows:
PSIO-1 (Processor Module) — 01
CPM-1 (Protection Module) — 20
CPM-2 (Protection Module) — 32
DSIO (EXV Driver Module) — 50
DSIO-HV (Relay Module)
PSIO-2 (12/6 I/O Module)
The first number of the address for a DSIO module should
be set on the switch closest to the silver mounting plate.
If all modules indicate communication failure, check
COMM plug on PSIO-1 module for proper seating. If a good
connection is assured and condition persists, replace PSIO-1
module.
If only a DSIO module indicates communication failure,
check COMM plug on that module for proper seating. If a
good connection is assured and the condition persists, replace
the DSIO module.
All system operating intelligence rests in the PSIO-1 mod-
ule, the module that controls unit. This module monitors condi-
tions through input and output ports and through DSIO mod-
ules (high-voltage relay module and EXV driver module).
The machine operator communicates with microprocessor
through keypad and display module. Communication between
PSIO and other modules is accomplished by a 3-wire sensor
bus. These 3 wires run in parallel from module to module.
65
COOLER
CONDENSER (30HXC MODEL)
OIL SEPARATOR (30HXA MODEL)
OIL SEPARATORS
(ONE VESSEL ON
30GX080-150 UNITS,
TWO SEPARATE ON
30GX151-350 UNITS)
— 62
— 74