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