TROUBLESHOOTING INDEX [WATER HEATER SYSTEM]

id0703d1800300

No.

TROUBLESHOOTING ITEM

DESCRIPTION

1

Water heater unit does not operate

•  Water heater unit does not operate (no flame noise) even under operation conditions (ambient temperature is less than 5 °C {41 °F} and engine coolant temperature is less than 40 °C {104 °F}).

•  Communication between M-MDS is disabled.

2

Abnormal noise from water heater unit

•  Combustion noise from water heater unit is loud.

•  Noise and vibration is transmitted to cabin during water heater unit operation.

3

Smoke from water heater unit

•  Smoke or odor is emitted during water heater unit operation.

•  Smoke or odor is emitted right after water heater unit starts operation.

No.	TROUBLESHOOTING ITEM	DESCRIPTION
1	Water heater unit does not operate	• Water heater unit does not operate (no flame noise) even under operation conditions (ambient temperature is less than 5 °C {41 °F} and engine coolant temperature is less than 40 °C {104 °F}). • Communication between M-MDS is disabled.
2	Abnormal noise from water heater unit	• Combustion noise from water heater unit is loud. • Noise and vibration is transmitted to cabin during water heater unit operation.
3	Smoke from water heater unit	• Smoke or odor is emitted during water heater unit operation. • Smoke or odor is emitted right after water heater unit starts operation.