Graco Reactor 2 H-30 Repair Manual page 32

Troubleshooting
Error Location
Error Error Location Location
T4EB Heater B
T6DA Heater A
32
Type Description
Type Type Description Description
High Temperature
Switch B
Sensor Error A
Cause Solution
Cause Cause Solution Solution
Overtemperature Heater was delivered too
much power, causing the
switch sensed a
fluid temperature overtemperature switch to
open. RTD is not reading
above 230°F
(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.
Overtemperature Replace overtemperature
switch failed in the switch.
open position.
Disconnected or Check all wiring and
loose RTD cable or connection to RTD.
connection.
Bad RTD. Switch the RTD with
another and see if the error
message follows the RTD.
Replace RTD if the error
follows the RTD.
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