Carrier 19XL ReplacingDefective Processor Modules

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.

ReplacingDefective Processor Modules — The

replacement part number is printed in a small label on front

ofthe 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. Verifythat the existing PSIO module is defective by us-

ingthe procedure described in the Troubleshooting Guide

section,page 66, and Control Modules section, page 78.

Do not select theAttach to Network Device table if the

LID displays communication failure.

2. Dataregarding 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.

Ifa 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

modulesshould be disconnected to prevent the new PSIO

modulefrom 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. Removethe 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 theATTACHTO NET-

WORK DEVICE line. Press the SELECT softkey.

Now, press the ATTACH softkey. The LID will dis-

play ‘‘UPLOADING TABLES, PLEASE WAIT’’ and

thendisplay ‘‘COMMUNICATIONSFAILURE.’’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

downto 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 softkeywhen you reach the correct value. Now,

move the highlight bar to the COMPRESSOR ON-

TIMEline. 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-

tionsin 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