9928487 R01 - 2018 RANGER XP 1000 Service Manual
© Copyright Polaris Industries Inc.
3.125
A/C THERMOSTAT OVERVIEW
The Electronic De-icing Thermostat (EDT) is a micro
controller based module that measures evaporator coil
temperature and cycles the compressor clutch to
maintain a constant evaporator pressure.
NOTE
The EDT has a six second delay before start up to
protect the compressor clutch.
The EDT will turn the clutch on when the evaporator coil
temperature is above 35.6°F (2°C). If the EDT does not
detect any malfunction, it will continue to operate and the
status LED will be lit continuously. When the evaporator
temperature is below 28.4°F (-2°C), the EDT will turn off
the clutch and status LED.
When the EDT detects an error from the temperature
sensor, the status LED will blink. Refer to the chart
below.
MALFUNCTION
DETECTION
INTERVAL
STATUS LED
Temperature
sensor open
and short
detection
Continuous
1x per second
Clutch circuit
open, short or
over current
At A/C start up
2x per second
Compressor
clutch short to
ground
Continuous
3x per second
NOTE
The EDT will attempt to restart every 20 seconds until
the fault is repaired.
HEATER VALVE REPLACEMENT
1.
Remove the passenger seat and storage bin.
2.
Disconnect the wiring harness from the heater valve.
3.
Remove the hose clamps and coolant hoses from
the heater valve.
NOTE
Plug the hoses to prevent contamination and coolant
loss from the system.
4.
Remove the fasteners retaining the heater valve to
the mounting bracket and remove the heater valve
from the vehicle.
5.
For installation, reverse removal procedure. Torque
heater valve fasteners to specification.
TORQUE
Heater Valve Fasteners:
8 lb-ft (11 Nm)
6.
Fill and bleed cooling system. Refer to Cooling
System Bleeding Procedure, page 3.91