System information

CLEARSKY COMFORTPRO DPF (PG1050 & PG1060) OPERATION & USERS MANUAL
14
• Check that temperature sensor and heater wiring harnesses are in good
condition.
• Check that connectors are mated properly.
• Verify that the heater is good: With the heater COLD, disconnect the
connector for the heater and check the resistance between pins on the
heater side of the connector.
Between Pins Resistance
3,4 less than 1 ohm
1,3 4-5 ohms
2,3 7-9 ohms
1,2 11-13 ohms
If you do not get these numbers then remove the DPF assembly cover and
check that the wires from the connector to the heater are not broken. You
can also check the resistances between the terminals on the heater.
• Verify that the controller is supplying power to the heater: Remove the DPF
assembly cover. Start the APU and start a regen (on the DCP2 go to the
DPF / Start Regen menu item, select YES and press MENU). Measure the
voltage on the heater terminals with respect to the heater chassis:
Heater Terminal Vac
Common (no color) less than 5V
H1 (red) more than 30V
H2 (blue) more than 30V
• Check that wiring harness to the generator and heater is in good condition
• This fault occurs if the generator voltage is very low, less than 65VAC. This
should only occur if there is a short circuit in the wiring or the generator is
not functioning.
• If the DCP2 shows "CRANK LIMIT" try manually starting the APU, this is
done by holding the ON/OFF button to crank the starter as long as the
button is held. If you crank for 30 seconds, allow the starter to cool for at
least 1 minute.
• Chec
k whether the DPF system is the cause of the problem: Disconnect the
CAN cable from the DCP2, remove the DCP2 from its enclosure and
disconnect the 2 pin gray Deutsch connector. Then go to the System Config
/ DPF menu item, select UN-INSTALL and press MENU and then try to start
the APU. If, after this, the APU still will not start then the problem is related
to the APU and not the DPF, check APU manual for additional
troubleshooting. Most likely causes include fuel problems (dirty fuel, fuel
ran low and system needs to be primed, fuel filters plugged etc).
• Normally most of the noise from the APU comes from the engine and not
the exhaust pipe. However, if the noise from the tailpipe seems louder than
normal a trained service person should remove the filter cartridge and
check for physical damage.
DPF Heater Failure
Generator Voltage Low
APU Does Not Start
APU is Very Loud
WARNING
The voltage can be up to 120VAC and
the heater cone will get hot so use
care in making these measurements.