Carrier HS070-160 User Manual

Page 23

Modules

Turn controller power off before servicing
controls. This is to ensure safety and prevent damage
to the controller.

PROCESSOR MODULE

LOW-VOLTAGE

R E L A Y M O D U L E

E X V D R I V E R

MODULE

The

and

modules

perform continuous diagnostic evaluations of the condi-
tion of the hardware. Proper operation of these modules
is indicated by

(light emitting diodes) on the front

surface of the

and on the top horizontal surface

of the PSIO.

Red LED:

at a 3 to 5 second rate indicates

proper operation

Lit

indicates a problem requiring replace-

ment of the module

indicates the power

be checked.

If there is no input power, check fuses. If fuse is bad, check
for shorted secondary of transformer, or for bad module.

Green LED: (On a

this the green LED closest to

the

connectors. The other green LED on the

module indicates external communications, when used.)

The green LED should always be blinking

on; it indicates that the modules are communicating

properly.

a green LED is not blinking, check

the red LED is normal, check the module address

switches. See Fig. 9. The proper addresses are:

(Processor Module)

(Relay Module)

Driver Module) -- 50

indicate a communication failure, check

the

module for proper seating.

connection is

and the condition per-

sists,

the

module.

only a

module indicates a communication

check the

plug on that module for proper

seating. a good connection is assured and the condition

persists.

the

All

operating

rests in the

(processor

the

that controls

the unit. This

monitors conditions through input

and output ports and

voltage

module and

module).

The machine

communicates with the micro-

processor through

module

module). Communication between

and the

other modules is accomplished by a

bus.

These 3 wires run in

from

to module.

Each module in a panel is numbered

Each

terminal strip on a module is

terminal strip number on the machine schematic com-
bines the module and strip numbers. For example,

terminal strip

on module 2. The module numbers can

be found on the component arrangement label.

ADDRESS
SELECTOR

Fig.

Module Address Selector Switch

Locations

2 3