Graco Reactor A-20 Repair Parts

Troubleshooting
311512A 11
Primary Heater
Hose power controller in lower cabi-
net illuminates green light, but amber
light not on. Temperature controller
01 output light is on steady. No heat
in hose.
Opening in hose circuit Disconnect main hose plug. Check
for only 0.4 - 6 ohm resistance
through hose circuit. Make sure all
hose connections are secure.
Hose secondary circuit breaker open Check hose secondary breaker.
Check for continuity across breaker.
Check current sensor for 18 ohms.
Hose power controller in lower cabi-
net illuminates green light, but amber
light not on. Temperature controller
01 output light is on steady. High heat
in hose.
Current sensor doughnut not con-
nected
Check hose power controller connec-
tions 15 and 16.
Hose cable not running through cur-
rent sensor doughnut
Check hose cable and reroute if
needed. Check sensor for 18 ohms.
Hose power controller is set too high Contact Graco Technical Assistance.
Low heat in hose. Hose power con-
troller in lower cabinet illuminates
green light, but amber light not on.
Temperature controller 01 output light
is on steady. No heat in hose.
More than 210 ft (64 m) of heated
hose used on machine (prevents
hose from reaching 45 amps)
Running at full voltage. Orange light
only comes on when power controller
is at 45 amp current limit.
PROBLEM CAUSE SOLUTION
Primary heat temperature controller
green switch light goes out
Primary heater 230°F (110 °C)
over-temperature switch tripped.
Reset heater switch to START after
cooling.
Solid state relay failed closed. Replace solid state relay 165 SSR.
Primary heat display low; power ON Temperature setpoint too low Check setpoint (SP1) and adjust if
necessary.
Fluid flow too high Use smaller mix chamber; decrease
pressure.
Heating element burned out Check heater element resistance;
see page 17.
Heating element fuse blown Determine high current cause;
replace fuse; see page 17.
Fluid too cold for flow rate Recirculate fluid in supply drum; see
Operation manual 311511.
No Primary heat. Temperature con-
troller output light is on. Green switch
light is on. Solid state relay indicator
light is on.
Contactor relay failed (190 CR) Check for line voltage across contac-
tor. Replace contactor.
Circuit breaker tripped (110 CB) Reset circuit breaker; investigate
cause.
Solid state relay failed (165 SSR) Check for line voltage across relay.
Primary heat temperature controller
displays “SbEr”
Thermocouple connection reversed Correct connections; see electrical
diagram in Heating Elements on
page 18.
Open thermocouple Check thermocouple resistance;
replace.

Graco Reactor A-20 Specifications

General

Brand	Graco
Model	Reactor A-20
Category	Paint Sprayer
Language	English