Owner’s Handbook
Page 3
Your PROHEAT X45 Plus is controlled by either an ON/OFF manual toggle switch or by the optional
PROHEAT 7-day timer. The timer can be controlled manually, or it can be set to start at a predetermined
time. Both devices have a light that indicates when the heater is operational as well as flashing corresponding
diagnostic codes indicated by the PCM. Your installer may have enabled optional features and heating modes.
Please see the X45 Plus Installation and Service manual 928560 or your Dealer for more information.
1. SWITCH ON
– The ON/OFF switch (or Timer) lamp and the PCM “ON” LED will light. In addition,
the Hour Meter (Auxiliary Output) will be powered. If the coolant temperature is below 150°F (65°C)
the PROHEAT enters Pre-check. If the coolant temperature is above 150°F (65°C) the PROHEAT
enters Standby.
2. PRECHECK
– The PCM performs a short diagnostic cycle. This takes a few seconds to check
components for proper ranges, checking for the presence of a flame, short-circuits and open circuits.
If there are no errors indicated, the PROHEAT goes to “Ignition”.
3. IGNITION
– The blower starts first, followed by the coolant pump, ignition spark, air compressor and
fuel pump. The ignition electrode sparks for up to 60 seconds. Once the flame sensor detects a good
flame, the PROHEAT goes to “Full Output”. The Sleeper Fan (if equipped) output then turns on.
4. FULL OUTPUT
– The PROHEAT runs at Full Output until the coolant temperature reaches 185°F
(85°C) at the heater outlet. The PROHEAT shuts the flame off and goes to “Cool down” (Purge).
5. COOL DOWN (Purge)
– The air compressor and fuel pump shut off immediately. The blower and
coolant pump continue to run. After 3 minutes, the blower stops and the PROHEAT goes to “Standby.”
6. STANDBY
– The coolant pump circulates the coolant through the system until the temperature
drops to 150˚F (65˚C) at the heater outlet; then it will enter Precheck and repeat steps 2 to 6. The
PROHEAT will continue to repeat steps 2 to 5 until it is switched “off.”
7. SWITCH OFF
– If PROHEAT is in Full Output, it will Cool Down (Purge) first, then shut “OFF”.
If PROHEAT is in Standby, it will shut “OFF” immediately.
When switched OFF, the Sleeper Fan (if equipped) output turns off.
When switched OFF, the Hour Meter (Auxiliary Output) will shut off.
Operating your PROHEAT
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Содержание X45 plus
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