Graco T-MAX 506, Operation - Repair - Parts

Page: 40 / 88

Troubleshooting
40 3A6748B
Motor is Hot and Runs Intermittently
Basic Electrical Problems Motor control board. Board shuts
down and displays error code.
See Control Board Diagnostics ,
page 43.
Electrical supply. Meter must read:
210-255 Vac for 220-240 Vac
models;
85-130 Vac for 100-120 Vac
models.
Reset building circuit breaker;
replace building fuse. Try another
outlet.
Extension cord. Check extension
cord continuity with volt meter.
Replace extension cord.
Sprayer power supply cord. Inspect
for damage such as broken
insulation or wires.
Replace power supply cord.
Check that motor leads are securely
fastened and properly mated.
Replace loose terminals; crimp to
leads. Be sure terminals are firmly
connected. Clean circuit board
terminals. Securely reconnect
leads.
ON/OFF Switch. Connect volt meter
between L1 and L2 terminal on
ON/OFF switch. Plug in sprayer and
turn ON. Meter must read:
210-255 Vac for 220-240V models
85-130 Vac for 100-120V models.
Replace ON/OFF switch.
Check all terminals for damage or
loose fit.
Replace damaged terminals and
reconnect securely.
Problem Cause Solution
Motor is hot and runs intermittently. Determine if sprayer was operated
at high pressure with small tips,
which causes low motor RPM and
excessive heat build up
Decrease pressure setting or
increase tip size.
Be sure ambient temperature where
sprayer is located is no more than
90°F and sprayer is not located in
direct sun
Move sprayer to shaded, cooler
area if possible.
Problem Cause Solution