Graco Therm-O-Flow Plus, Инструкция по эксплуатации

Страница: 54 / 82

54 309085
Air Motor Troubleshooting
For additional information about the air motor, see manual 307049.
Problem Cause(s) Solution(s)
Air motor does not run Air motor solenoid is off Wait for heat zones in use to reach
“window” around temperature set
values.
Air motor will not shift directions,
stalled in DOWN position Main air valve spool is dirty or damaged Clean/rebuild main air valve.
Air motor will not shift directions,
stalled in UP position
Air motor stalled halfway between
the top and bottom
Air continually exhausting around
air motor shaft.
Air motor shaft seal is damaged Replace air motor shaft seal.
Air continually exhausting around
the air valve/slide valve Air valve/slide valve gasket is damaged Replace the valve gasket.
Air continually exhausting from
muffler while the motor is idle Internal seal damage Rebuild air motor.
Oil leaking from exhaust port Too much lubricant mixed in with the air
supply Reduce lubricant supply.
Frost build-up on muffler Air motor operating at high pressure, or
high cycle rate Reduce pressure, cycle rate, or
duty cycle of the air motor.
Electrical Control Panel Troubleshooting
For more information, see the electrical control panel documentation.
Problem Cause(s) Solution(s)
Disconnect is ON, but no indica-
tor lights are lit The ground fault interrupt has been
activated Reset the ground fault interrupt.
See procedure on page 27.
One or more fuses has (have) been
blown Replace the blown fuse(s)
High Temperature Alarm lights The temperature of a heated compo-
nent has gone out of range. Supply unit automatically turns off
power to supply unit components
and air motor. Unit turns power
back on when overheated compo-
nents reach appropriate tempera-
tures.
Heat is turned off after a period of
pump inactivity Pump has not moved within the pro-
grammed time period and the inactivity
timer has been triggered. See procedure on page 26.
High Temperature Alarm indicator
is lit before the unit has heated up One or more temperature controllers
has different alarm value settings. Set the alarm values on all temper-
ature controllers to the same set-
tings.
One or more temperature controllers
correspond to zones that are not in use. Turn off the unused temperature
controller(s). See Form 309100.