Hatz 4H50TIC - Page 92

Flash signal
Short – Long
Possible causes Remedy Chapter
1 – 3
Area affected:
Air supply
▪ Air filter is dirty.
▪ Charge air after
charge air cooler
too high.
▪ Charge air sen-
sor/intake low
pressure sensor
cabling faulty.
▪ Service the air fil-
ter
▪ Clean the radia-
tor fins.
▪ Check the ca-
bling.
8.2.14 Serv-
icing the air
filter (option-
al), page 80
8.2.6 Clean-
ing the radi-
ator fins,
page 64
1 – 4
Area affected:
Exhaust gas recir-
culation
▪ EGR sensor ca-
bling faulty.
▪ EGR radiator/
valve clogged by
deposits.
▪ Check the ca-
bling.
▪ Clean the EGR
radiator/valve.
2 – 1
Area affected:
Fuel low pressure
system
▪ Water in fuel.
▪ Fuel pressure
too low.
▪ Fuel temperature
too high.
▪ Fuel pump or
sensor cabling
faulty.
▪ Drain water from
the fuel prefilter.
▪ Check the fuel
tank level, refuel
if required.
▪ Replace both
fuel filters.
▪ Ensure the fuel is
sufficiently
cooled.
▪ Check the ca-
bling.
8.2.11
Draining the
water sepa-
rator,
page 73
7.7 Refuel-
ing, page 49
8.2.12
Changing
the fuel pre-
filter,
page 74
8.2.13
Changing
the fuel fine
filter,
page 77
2 - 2
Area affected:
Fuel high pressure
system
▪ Sensor system
(injectors, rail
pressure sensor,
pressure control
valve, high pres-
sure pump) ca-
bling faulty.
▪ Check the ca-
bling.
4H50TIC Faults
HATZ
Operator's Manual 93