Proheat M80 Manuel de service télécharger pdf (Page 32)

CAUTION

Always ensure that the PROHEAT is allowed to Cool Down (Purge) for a full 3

minutes.

If the power is shut off without a proper Cool Down (Purge) during

Full Output, DAMAGE TO THE HEATER MAY OCCUR.

6. Standby

7. Switch “OFF”

8. Fault Shut

Down

NOTE: Only the G-II PCM has an indicator light. See

page C-1

for more information.

The ON/OFF switch lamp, timer lamp or OEM indicator (installation options)

will

light. In addition, the G-II PCM Indicator Light with turn ON GREEN. 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.

The G-II PCM performs self diagnosis checking sensors for correct range,

electrical components for over-load and for a flame presence. Also during the

first Pre-check, the Ignition Module sparks for five seconds to allow a service

technician to visually check for a spark. If there are no errors indicated, the

PROHEAT goes to Ignition.

The Motor and Coolant Pump start first, followed by the ignition spark, and

then Fuel Solenoid Valve opens. The Ignition Module sparks for 30 seconds

during which time the flame sensor must detect a correct flame.

• If the PROHEAT detects proper flame at any time during the 30 second

ignition cycle, the PROHEAT enters Full Output.

• If the PROHEAT does not detect proper flame during the 30 second ignition

cycle, the PROHEAT enters Cool Down (Purge). The PROHEAT will attempt

to start again moving into Pre-check after Cool Down (Purge). If the

second start cycle fails, the PROHEAT will enter Fault Shut Down.

The PROHEAT will continue in Full Output until the coolant temperature reaches

185°F (85°C) at the PROHEAT'S Dual Mode Temperature Sensor. The PROHEAT

closes the Fuel Solenoid Valve and goes into Cool Down (Purge).

1. Momentary

Switch “ON”

Preheat Mode

Signal

2. Pre-check

3. Ignition

PREHEAT MODE (ENGINE OFF)

2.3.2

The Coolant Pump continues to circulate coolant throughout the system.

When the coolant temperature drops below 160°F (71°C), the G-II PCM will

enter the cycle starting at Pre-check. The PROHEAT will continue to repeat

Steps 2 to 6 until it is switched “OFF.”

The ON/OFF switch lamp, timer lamp or OEM indicator (installation options)

will turn off. In addition, the G-II PCM Indicator Light will turn OFF.

If the PROHEAT is in Full Output, it will Cool Down (Purge) first and then shut

“OFF”.

If the PROHEAT is in

Standby, it will shut “OFF” immediately.

If the PROHEAT diagnostics sense a system or component fault, the PROHEAT

will shut down all components and flash diagnostic code(s) which best

represent the conditions. The flash codes will be shown on the G-II PCM

Indicator Light in RED. In addition, the ON/OFF switch lamp, timer lamp or

OEM indicator (installation options) will also flash the same code(s). To reset

the PROHEAT, it must be switched off and then on again.

NOTE:

Damage may occur it the diagnostic codes are ignored and the PROHEAT

is repeatedly switched off and on without addressing the problem.

4. Full Output

GREEN

INDICATOR

LIGHT

OFF

RED

2-7

PROHEAT M-SERIES G-II PCM SERVICE MANUAL

1 2 ... 27 28 29 30 31 32 33 34 35 36 37 ... 89 90

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Proheat M80 Manuel de service Page 32

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