Graco 259079 Operation Manuals page 84

Troubleshooting
Error Error Type
Code Position
T8DA Boost A ALARM
T8DB Boost B
T8DH Hose
V1CM MCM ALARM
V1MH Hose ALARM
V4CM MCM ALARM
V4MH Hose ALARM
WBNM MCM ALARM
84
Name Cause
Temperature Not Bad heater rod (boost).
Rising
Bad hose heater.
Started spraying before
engine and hose reached
operating temperature.
Bus Under Tripped circuit breaker.
Voltage
Low Line Voltage Loose or bad connection. Check wiring for loose wires.
Low generator line
voltage
High auxiliary inrush
current.
Bus Overvoltage Incoming line voltage is
too high.
High Line Voltage
Motor Sensor Bad Connection between
Fault MCM (Port 10) and brush
wear/over temperature
board.
Bad brush wear/over
temperature board.
Solution
Measure resistance, 23 – 26
Ω, of heater rod, replace if
reading open.
Measure hose resistance,
replace if reading open.
Wait until temperatures have
been reached on engine and
hose before spraying.
Visually check circuit
breaker for a tripped
condition.
Measure voltage across
main power switch (CT01).
Voltage should measure
between 190 and 264 VAC.
Ensure compressor or
air drier are setup to be
continuous run and sized
according to manual.
Measure voltage across
main power switch (CT01).
Voltage should measure
between 190 and 264 VAC.
If voltage is too high, see
supplied alternator manual
for generator specifications
and repair.
Check connection and
cables.
Replace Motor. See System
Repair manual.
3A1705E