Carrier 23XL Specifications download pdf (Page 82)

Terminal block connections are provided on the options

modules. All sensor inputs are ﬁeld wired and installed. Op-

tions module number 1 can be factory or ﬁeld installed. Op-

tions module 2 is shipped separately and must be ﬁeld in-

stalled. For installation, refer to unit or ﬁeld wiring diagrams.

Be sure to address the module for the proper module number

(Fig. 48) 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 replace-

ment module. When ordering a replacement processor mod-

ule (PSIO), specify complete replacement part number, full

unit model number, and serial number. This new unit re-

quires reconﬁguration to the original machine’s data by the

installer.

Electrical shock can cause personal injury. Disconnect

all electrical power before servicing.

INSTALLATION

1. Verify if the existing PSIO module is defective, by us-

ing the procedure described in the Troubleshooting Guide

section, page 68, and Control Modules section,

page 80. Do not select the Attach to Network Device

from the service menu if the LID displays communica-

tion failure.

2. Data regarding the PSIO conﬁguration should have been

recorded and saved. This data will have to be reconﬁg-

ured into the LID. If this data is not available, follow

the procedures described in the Set Up Machine Control

Conﬁguration section on page 50.

If a CCN Building Supervisor or Service Tool is present,

the module conﬁguration should have already been up-

loaded into memory; then, when the new module is in-

stalled, the conﬁguration can be downloaded from the

computer.

Any communication wires from other machines or CCN

modules should be disconnected to prevent the new PSIO

module from uploading incorrect run hours into

memory.

3. Check that all power to the unit is off. Carefully dis-

connect all wires from the defective module by unplug-

ging the 6 connectors. It is not necessary to remove any

of the individual wires from the connectors.

4. Remove defective PSIO by removing its mounting screw

with a long-shaft Phillips screwdriver, and removing the

module from the control center. Save the screw for later

use. The green ground wire is held in place with the mod-

ule mounting screw.

5. Package the defective module in the carton of the new

module for return to Carrier.

6. Mount the new module in the unit control center using

a long-shaft Phillips screwdriver and the screw saved in

Step 4 above. Make sure that the green grounding wire

is reinstalled along with the mounting screw.

7. Connect the LID communication wires (Level II bus)

and the power wires only. If CCN wiring has been at-

tached to the Level II bus, disconnect the wires.

8. Carefully check all wiring connections before restoring

power.

9. Restore control power and verify that the red and green

LEDs on the PSIO are functioning properly.

10. Access the Attach to Network Device table on the LID

Service menu. Set the local device address to Bus

0, Address 90. Press the ATTACH

softkey to upload

the PSIO into the LID.

11. Change the address of the PSIO in the Conﬁg table of

the Equipment Conﬁguration table back to the previous

value. Write the address on the PSIO.

12. Use the conﬁguration sheets to input set point, conﬁgu-

ration, and schedule information into the PSIO. Time

and Date also must be set through the service menu. A

Building Supervisor can be used to download the old

conﬁguration into the PSIO.

13. Perform a Control Test and verify all tests. Select Con-

trol Test from the service menu

If the software version has been updated, a CCN down-

load of the conﬁguration will not be allowed. Conﬁgure

the PSIO by hand, and upload the PSIO into the net-

work by using the Attach to Network Device table.

14. Restore chiller to normal operation, calibrate motor amps.

NOTE: Options module address switches should be set as follows:

SWITCH

SETTING

OPTION

MODULE 1

OPTION

MODULE 2

S1 67

S2 42

Fig. 48 — Options Module

1 2 ... 77 78 79 80 81 82 83 84 85 86 87 ... 103 104

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Carrier 23XL Specifications Page 82

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