Graco 312066z Manual De Usuario

Troubleshooting

312066Z

17

Reactor does not operate.

No power.

Plug in power cord.

Turn main power ON 

.

Turn circuit breakers ON, page 32.

Red stop button circuit open.

Check button connections. See page 
46 and electrical diagrams.

Motor does not operate.

Loose connections.

Check connections at motor control 
board.

Circuit breaker tripped.

Reset breaker (CB5), page 32. 
Check 230Vac at output of breaker.

Worn brushes.

Check both sides. Length must be 
0.7 in. (17 mm) minimum. To replace, 
page 30.

Broken or misaligned brush springs.

Realign or replace, page 30.

Brushes or springs binding in brush 
holder.

Clean brush holder and align brush 
leads for free movement.

Shorted armature.

Replace motor, page 33.

Check motor commutator for burn 
spots or other damage.

Remove motor. Have motor shop 
resurface commutator, if possible.

Damaged motor control board.

Replace board. See page 34.

Fan not working.

Blown fuse.

Replace, page 36.

Loose wire.

Check.

Defective fan.

Replace, page 36.

Pump output low.

Obstructed fluid hose or gun; fluid 
hose ID too small.

Open, clear; use hose with larger ID.

Worn piston valve or intake valve in 
displacement pump.

See pump manual.

Pressure setpoint too high.

Reduce setpoint and output will 
increase.

Fluid leak in pump packing nut area.

Worn throat seals.

Replace. See pump manual.

No pressure on one side.

Fluid leaking from heater inlet rupture 
disk (314).

Check if heater (2) and PRESSURE 
RELIEF/SPRAY valve (SA or SB) are 
plugged. Clear. Replace rupture disk 
(314) with a new one; do not replace 
with a pipe plug.