Troubleshooting

 

 

 

 

 

 

 

 

 

 

Error

Error

Type

Name

Cause

Solution

Code

Position

 

 

 

 

T8AE

Heat

ALARM

Temperature Not

Low chemical supply

Recirculate heated chemical

T8BE

Exchanger

 

Rising Hx A (T8AE)

temperature.

back to drum in cold conditions

 

 

Temperature Not

 

before spraying. Chemical

 

 

 

 

 

 

 

 

below 32°F(0°C) at startup.

 

 

 

Rising Hx B (T8BE)

 

 

 

 

System stored below

Ensure ambient temperature is

 

 

 

 

20°F(-7°C) causing slow

above 20°F(-7°C).

 

 

 

 

control valve operation.

 

 

 

 

 

Plugged filter in sight glass.

Clean or replace filter. See

 

 

 

 

Indicated by consistent

system repair manual.

 

 

 

 

low A and B temperature

 

 

 

 

 

alarms.

 

 

 

 

 

Coolant debris stuck in

Inspect and clean control valve.

 

 

 

 

valve pilot hole or passages.

Repair or replace if necessary.

 

 

 

 

 

See system repair manual.

 

 

 

 

No coolant flow

Check coolant level. Check for

 

 

 

 

 

coolant flow in sight glass.

 

 

 

 

 

Ensure that the circulation

 

 

 

 

 

pump has 240 VAC. If not,

 

 

 

 

 

replace the circulation pump.

 

 

 

 

 

See system repair manual.

 

 

 

 

(T8AE only) J6 connector on

Reconnect J6 connector on

 

 

 

 

load center “Heat Valves”

load center in centered location.

 

 

 

 

location is not centered.

 

 

 

 

 

Bad valve solenoid coil.

Turn on the manual valve

 

 

 

 

 

switch (MV), on the load center,

 

 

 

 

 

and see if the valve solenoid

 

 

 

 

 

shifts. For coolant valve LED

 

 

 

 

 

identification, see system repair

 

 

 

 

 

manual. If solenoid does not

 

 

 

 

 

shift, replace solenoid coil. See

 

 

 

 

 

system repair manual.

 

 

 

 

Valve solenoid not getting

Verify 12 VDC signal is at the

 

 

 

 

12 VDC electrical signal.

valve solenoid coil connector.

 

 

 

 

 

All three valves are normally

 

 

 

 

 

closed with power removed.

 

 

 

 

 

See system repair manual

 

 

 

 

 

for valve wiring harness

 

 

 

 

 

identification diagram.

 

 

 

 

Bad load center.

Red, blue, and green LEDs

 

 

 

 

 

should light up on load center

 

 

 

 

 

board. If not, replace load

 

 

 

 

 

center. See system repair

 

 

 

 

 

manual.

 

 

 

 

A and B heat

See System Repair Manual for

 

 

 

 

exchanger RTD cables

correct connection.

 

 

 

 

cross-connected to splitter

 

 

 

 

 

cable.

 

86

3A1705J

Page 86
Image 86
Graco 3A1705J important safety instructions T8AE