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
- 9 -
P/N 53-00855-856 Rev. C 080819
Symptom
Possible Cause / Remedy
No green “ON” indicator, Thermostat in any functional
position
Reset circuit breakers in Main distribution box.
Diagnostic “IPX OK” LED on the control module is
NOT
on
:
If “IPX FAULT” LED is
NOT
on,
1) Check the 5A fuse in the distribution panel for
control module power.
2) Check for +12VDC at pin 2 of J1 on control
module and ground at pin 4. Make sure that
the power connector (PC1A) is plugged into J1
on the control module. Make sure that the
pigtail keying matches connector keying.
3) Check voltage at the line sensor input (J7). It
should be greater than 11 volts.
4) Measure the DC voltage between the Power
(J1-4), IPX SIG (J1-8) and IPX GND (J1-7) pins
on the control module. There should be
approximately 12 volts from IPX GND to Power
and 9 volts from IPX GND to IPX SIG. The
same voltages should appear at the
Thermostat. If not, repair wiring.
5) Replace control module.
If the “IPX FAULT” LED is
ON
: - This indicates a short
in the wiring between the control module and the
thermostat. Check the wiring for the short and repair.
Red “Shed” indicator always ON
1) Appliances drawing too much current to allow
air conditioners to operate.
2) Current sensor not connected or open. Repair
or replace.
3) Another device in the IPX system is
programmed for Module P and is currently
active.
