Graco 259079 Operation Manuals page 82

Troubleshooting
Error Error Type
Code Position
T4DH Hose ALARM
T4DE Heat ALARM
Exchanger
T4NM MCM ALARM
82
Name Cause
High Chemical Bad High Power
Temperature Temperature Control
Module.
High Temperature Broken Fan.
Coolant Outlet
Plugged radiator.
High Motor Cooling fans are not
Temperature operating properly.
Bad electric motor.
Solution
Replace HPTCM. See
System Repair manual.
Check fan relay (K4) and
fuse (30 Amp ATO "F3") on
load center board. Replace
if needed.
Replace if needed.
Ensure ambient temperature
is less than 120°F(48°C).
Check to see that the fans
are moving. Measure
voltage to fans. There
should be 240 VAC. If no
voltage is measured, check
wiring between fan and
circuit breaker CB03.
If the fans have voltage but
are not moving, replace fan.
Use an air hose to blow out
around the fan housings and
remove any built-up debris.
Replace electric motor. See
System Repair manual.
3A1705E