Intellitec ELECTRONIC CLIMATE CONTROL II Service Manual page 5

ELECTRONIC CLIMATE CONTROL II
SERVICE MANUAL Part No's. 00-00855-000 / 00-00856-000
VDC) wiring. The Control Module uses high-side switching to operate the corresponding relays. One side of each of the
relay coils is connected together. This "common" lead is connected to ground through the Control Module and should not
be grounded anywhere else. The other side of each of the coils is brought out to one of three separate leads. These
leads are connected to the Control Module via a four-pin connector: J2 for the A/C1 unit and J3 for the A/C2 unit. The
corresponding pigtail connectors, PC2 and PC3, are supplied with the system. PC3, the A/C2 connector, is marked in red
in order to differentiate it from PC2.
THE ECC LINE VOLTAGE SENSOR:
The ECC line voltage sensor is used by the system to detect when line voltage is available. When the line voltage is
present, the sensor outputs a DC voltage to the control module. When the line voltage is not present, the system goes to
sleep, turning off unnecessary parasitic loads to conserve battery power. The sensor is connected to J7 during normal
operations (i.e., not during HI-POT testing). This sensor should be disconnected and J7 shorted with a jumper to conduct
the HI-POT test.
The following table indicates the connection and control states:
MODULE
CONN PIN
NOTE: The PC2 (J2) and PC3 (J3) pigtail wire colors are included for reference only to identify the function of the wires
emanating from the control module. The wire colors emanating from the A/C1 and A/C2 units may, or may not agree with
these colors. Always refer to the installation manual supplied with the A/C unit, or see "Identifying control lead functions
on the A/C unit", in order to match the wire color/functions with those on the control module.
TEST SWITCH:
The control module incorporates a three-position test switch located between J2 and J3 to verify the operation and wiring
of each A/C unit only.
Sliding the test switch towards J2 bypasses the control module completely and operates the high fan and compressor for
A/C 1 by connecting J2-3 and J2-4 to +12V. If the air conditioner fails to operate in this position, the problem is with the
air conditioner or wiring between the control module and the air conditioner. Sliding the test switch towards J3 operates
the high fan and compressor for A/C 2 by connecting J2-3 and J2-4 to +12V.
The test switch must be placed in the CENTER or OFF position for normal operation.
The test switch can be used to temporarily operate the air conditioners in the event of a control module or thermostat
failure.
IPX INDICATORS:
The communication wires connecting the thermostat to the control module are protected from short circuits. However if
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PIGTAIL
WIRE
COLOR
J2-1 BLU
J2-2 GRY
J2-3 GRN
J2-4 YEL
J3-1 BLU
J3-2 GRY
J3-3 GRN
J3-4 YEL
FUNCTION
VOLTAGE
COMMON <1 VDC
LOW FAN +12 VDC
HIGH FAN +12 VDC
COMPRESSOR +12 VDC
COMMON <1 VDC
LOW FAN +12 VDC
HIGH FAN +12 VDC
COMPRESSOR +12 VDC
- 5 -
"ON" "OFF"
VOLTAGE
<1 VDC
<1 VDC
<1 VDC
<1 VDC
<1 VDC
<1 VDC
<1 VDC
<1 VDC
P/N 53-00855-856 Rev. C 080819
1485 Jacobs Rd.
Deland, FL 32724
386.738.7307