Graco Reactor 2 H-30 Repair Manual page 31

Error Location
Error Error Location Location
T4DH Hose
T4EA Heater A
334946C
Type Description
Type Type Description Description
High Temperature
Hose
High Temperature
Switch A
Cause Solution
Cause Cause Solution Solution
Hose portion Shade exposed hose from
exposed to an
hot sun or expose FTS to
excessive heat same environment when
source, like hot
at rest. Uncoil entire hose
sun or coiled before heating to avoid
hose, can pass self-heating.
fluid more than
27°F (15°C) over
hose temperature
setting to the FTS.
Increase hose setpoint
Setting the A or
B setpoint much so it is closer to A and B
higher than hose setpoints.
setpoint can cause
fluid more than
27°F (15°C) over
hose temperature
setting to reach the
FTS.
Cold ambient Cold ambient temperature
temperature is is chilling the FTS and
causing hose to causing hose heat to stay
heat on longer than needed.
Insulate the FTS area of the
hose so that it heats at the
same rate as the rest of the
hose.
Overtemperature Heater was delivered too
much power, causing the
switch sensed a
fluid temperature overtemperature switch to
above 230°F open. RTD is not reading
(110°C). properly. After the heater
cools down, replace RTD.
Switch closes and the error
can be cleared when the
heater temperature falls
below 190°F (87°C).
Disconnected If heater is not actually
or loose over temperature, check
overtemperature all wiring and connections
switch between the TCM and the
cable/connection. overtemperature switches.
Replace overtemperature
Overtemperature
switch failed in the switch.
open position.
Troubleshooting
31