Control Modules - Carrier AquaEdge 23XRV Start-Up, Operation And Maintenance Instructions Manual

Turn controller power off before
Control Modules —
servicing controls. This ensures safety and prevents damage to
the controller.
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.
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 a problem that requires
replacing the module
• Is off continuously — the power should be checked
• Blinks 3 times per second — a software error has been
discovered and the module must be replaced
If there is no input power, check the CB2 control power
circuit breaker and control power transformer circuit breakers
(CB1A and CB1B). If the breakers are good, check for a short-
ed 24 vac secondary of the T1 transformer or, if power is pres-
ent to the module, replace the module.
GREEN 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 a
3-wire SIO communication protocol cable.
Fig. 60 — Rear of ICVC (International Chiller Visual Controller)
2. If a green LED is on continuously, check the communica-
tion wiring. If a green LED is off, check the red LED op-
eration. If the red LED is normal, check the SIO address
switches (Fig. 60 and 61). Confirm all SW1 SIO address
dip switches on the CCM are in the OFF position.
All system operating intelligence resides in the ICVC.
Some safety shutdown logic resides in the VFD Gate-
way in case communications are lost between the VFD
and ICVC. Outputs are controlled by the CCM and
VFD Gateway as well.
3. In the control center, a 3 KVA transformer steps down
line power to 115 V. This supplies power to the oil pump,
oil vaporizer heater, oil sump heater, and control power
transformers. Power is supplied to the ICVC and CCM
modules within the control center via the T1 24-VAC
transformer.
The control power transformers are located on the
power panel.
Transformer T1 supplies 24 V power to the ICVC and
CCM. Transformer T2 provides 20 V power to
optional DataPort™ or DataLINK™ modules.
Power is connected to Plug J1 on the ICVC and CCM
modules.
Chiller Control Module (CCM) (Fig. 61)
INPUTS — Each input channel has 2 or 3 terminals. Refer to
individual chiller wiring diagrams for the correct terminal
numbers for your application.
OUTPUTS — CCM terminals J11 and J12 are discrete (on/
off) outputs that switch 24 volts. The 4 to 20 mA output chan-
nel on terminals J8-1 and J8-2 is designed for non-grounded
controllers with a maximum input impedance of 500 ohms.
J8-3 and J8-4 are used with a 500-ohm resistor to control the
oil reclaim actuator.
GROUND
SIO COMMUNICATIONS (J7)
POWER AND CCN (J1)
RJ-14 SERVICE
CONNECTION (J8)
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