ELECTRONIC CLIMATE CONTROL II
SERVICE MANUAL Part No’s. 00-00855-000 / 00-00856-000
Intellitec
1485 Jacobs Rd.
Deland, FL 32724
386.738.7307
www.Intellitec.com
- 5 -
P/N 53-00855-856 Rev. C 080819
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
PIGTAIL
WIRE
COLOR
FUNCTION “ON”
VOLTAGE
“OFF”
VOLTAGE
J2-1
BLU
COMMON
<1 VDC
<1 VDC
J2-2
GRY
LOW FAN
+12 VDC
<1 VDC
J2-3
GRN
HIGH FAN
+12 VDC
<1 VDC
J2-4
YEL
COMPRESSOR
+12 VDC
<1 VDC
J3-1
BLU
COMMON
<1 VDC
<1 VDC
J3-2
GRY
LOW FAN
+12 VDC
<1 VDC
J3-3
GRN
HIGH FAN
+12 VDC
<1 VDC
J3-4
YEL
COMPRESSOR
+12 VDC
<1 VDC
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
