Refrigerator User Manual

Terminal block connections are provided on the options
modules. All sensor inputs are field wired and installed.
Options module number 1 can be factory or field-installed.
Options module 2 is shipped separately and must be field
installed. For installation, refer to the unit or field wiring
diagrams. Be sure to address the module for the proper mod-
ule number (Fig. 43) and to configure the chiller for each
feature being used.
Replacing Defective Processor Modules — The
replacement part number is printed in a small label on front
of the PSIO module. The model and serial numbers are printed
on the unit nameplate located on an exterior corner post.
The proper software is factory-installed by Carrier in the
replacement module. When ordering a replacement proces-
sor module (PSIO), specify complete replacement part
number, full unit model number, and serial number. This new
unit requires reconfiguration to the original chiller data by
the installer. Follow the procedures described in the Set Up
Chiller Control Configuration section on page 50.
Electrical shock can cause personal injury. Disconnect
all electrical power before servicing.
INSTALLATION
1. Verify that the existing PSIO module is defective by us-
ing the procedure described in the Troubleshooting Guide
section, page 66, and Control Modules section, page 78.
Do not select the Attach to Network Device table if the
LID displays communication failure.
2. Data regarding the PSIO configuration should have been
recorded and saved. This data will have to be recon-
figured into the LID. If this data is not available, follow
the procedures described in the Set Up Chiller Control
Configuration section.
If a CCN Building Supervisor or Service Tool is present,
the module configuration should have already been
uploaded into memory; then, when the new module is
installed, the configuration can be downloaded from the
computer.
Any communication wires from other chillers or CCN
modules should be disconnected to prevent the new PSIO
module from uploading incorrect run hours into memory.
3. To install this module, first record the TOTAL COM-
PRESSOR STARTS and the COMPRESSOR ONTIME
from the Status01 table screen on the LID.
4. Power off the controls.
5. Remove the old PSIO. DO NOT install the new PSIO at
this time.
6. Turn on the control power. When the LID screen re-
appears, press the MENU
softkey, then press the
SERVICE
softkey. Enter the password, if applicable.
Move the highlight bar down to the ATTACH TO NET-
WORK DEVICE line. Press the SELECT
softkey.
Now, press the ATTACH
softkey. The LID will dis-
play ‘‘UPLOADING TABLES, PLEASE WAIT’’ and
then display ‘‘COMMUNICATIONS FAILURE.’’ Press
the EXIT softkey.
7. Turn the control power off.
8. Install the new PSIO module. Turn the control power
back on.
9. The LID will now automatically upload the new PSIO
module.
10. Access the Status01 table and move the highlight bar
down to the TOTAL COMPRESSOR STARTS line. Press
the SELECT
softkey. Increase the value to indicate
the correct starts value recorded in Step 2. Press the
ENTER
softkey when you reach the correct value. Now,
move the highlight bar to the COMPRESSOR ON-
TIME line. Press the SELECT
softkey. Increase the run
hours value to the value recorded in Step 2. Press the
ENTER
softkey when the correct value is reached.
11. Complete the PSIO installation. Following the instruc-
tions in the Start-up, Operation, and Maintenance manual,
input all the proper configurations such as time, date,
etc. Re-calibrate the motor amps and check the pres-
sure transducer calibrations. PSIO installation is now
complete.
SWITCH
SETTING
OPTIONS
MODULE 1
OPTIONS
MODULE 2
S1 67
S2 42
Fig. 43 — Options Module
80