Carrier XRV Specifications download pdf (Page 107)

107

Control Modules

The ICVC and CCM modules perform continuous diagnos-

tic evaluations of the hardware to determine its condition.

Proper operation of all modules is indicated by LEDs

(light-emitting diodes) located on the circuit board of the ICVC

and CCM.

There is one green LED located on the CCM board, and one

red LED located on the ICVC and CCM boards respectively.

RED LED (Labeled as STAT) — If the red LED:

• Blinks continuously at a 2-second interval, the module is

operating properly

• Is lit continuously, there is most likely a hardware fault that

requires replacing the module

• Is off continuously, the power should be checked

• Blinks 3 times per second, a software error has been discov-

ered and the module must be replaced

If there is no input power, check the fuses and circuit breaker.

If the fuse is good, check for a shorted secondary of the trans

former or, if power is present to the module, replace the module.

GREED LED (Labeled as COM) — These LEDs indicate

the communication status between different parts of the con

troller and the network modules and should blink continuously.

Notes on Module Operation

1. The chiller operator monitors and modifies configura-

tions in the microprocessor by using the 4 softkeys and

the ICVC. Communications between the ICVC and the

CCM is accomplished through the SIO (Sensor Input/

Output) bus, which is a phone cable. The communication

between the CCM and VFD is accomplished through the

sensor bus, which is a 3-wire cable.

2. If a green LED is on continuously, check the communica-

tion wiring. If a green LED is off, check the red LED

operation. If the red LED is normal, check the module

address switches (SW1). See Fig. 48 and 49. Confirm all

switches are in OFF position.

All system operating intelligence resides in the ICVC.

Some safety shutdown logic resides in the Gateway in

case communications are lost between the VFD and

ICVC. Outputs are controlled by the CCM and VFD as

well.

3. Power is supplied to the modules within the control panel

via the 24-vac T1 and T2 transformers. The transformers

are located within the power panel.

In the power panel, T1 supplies power to the compressor

oil heater, and optional hot gas bypass, and T2 supplies

power to both the ICVC and CCM.

T3 provides 24-v power to the optional DataPort™ or

DataLINK™ modules.

Power is connected to Plug J1 on each module.

Chiller Control Module (CCM) (Fig. 49)

INPUTS — Each input channel has 2 or 3 terminals. Refer to

individual chiller wiring diagrams for the correct terminal

numbers for a specific application.

OUTPUTS — Output is 24 vac. There are 2 terminals per

output. Refer to the chiller wiring diagram for a specific

application for the correct terminal numbers.

CAUTION

Turn controller power off before servicing controls. This

ensures safety and prevents damage to the controller.

CCN INTERFACE

CONNECTION

DATALINK OR

DATAPORT MODULE (OPTION)

SW1BACK OF ICVC

MODULE PART NUMBER

SOFTWARE PART NUMBER

J7 SIO J1 POWER/

CCN

J8 SERVICE

ICVC

CONTRAST

ADJUSTMENT

Fig. 48 — Rear of ICVC (International Chiller Visual Controller)

a19-1633

1 2 ... 102 103 104 105 106 107 108 109 110 111 112 ... 189 190

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Carrier XRV Specifications Page 107

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