Conditions For Scr System Operation - Zetor CRYSTAL HD 150 Operator's Manual

SYSTEM OF ADDITIONAL TREATMENT OF EXHAUST GASES
8 - the regeneration of the DPF has begun, and the estimated time of the regeneration is displayed in the
bottom line
9 - cooling the system after the regeneration is complete, DO NOT SWITCH OFF THE ENGINE!
10 - DPF filter regeneration is complete, you can continue to work with the tractor without restrictions
Do not stop the engine during regeneration of DPF (the green signal lamp flashes) - there is
a risk of damage of the system of treatment of exhaust gases. Do not stop the engine immediately
after regeneration of DPF filter.Leave the engine idling at low revolutions until sufficient decrease of
temperature of the system of treatment of exhaust gases is achieved!

Conditions for SCR system operation

The amount of urea in the tank is displayed on the instrument panel. If the amount of urea in the tank is
exhausted when the engine is running, the injector in the exhaust manifold is in danger of being damaged
and the engine power can be reduced. The catalytic reduction is stopped and the amount of harmful
emissions in exhaust gases is increased. When urea is added in the tank, the catalytic reduction is restored.
Operation of the tractor without the SCR (selective catalytic reduction) system is prohibited!
Conditions for proper functioning of the system
- temperature of cooling liquid must be higher than 60°C,
- working temperature of the catalyst must be higher than 250°C
- outdoor temperature must be higher than -20°C,
- engine revolutions must be higher than 1,000 rpm
- requirement for the withdrawn torque must be higher than 20%.
If urea freezes, the tank is electrically heated. If no melting during 70 min occurs, the engine
power together with the corresponding error message are activated.
C18N036
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