Graco Reactor E-XP1 Troubleshooting Manual page 10

Reactor Error Code Trouble Shooting Guide
 One of the over temperature switches failed in the "open" position. Open circuit in
the over temperature wiring harness, or switch "B" jumper is loose or open on a
dual zone heater systems.
 Make sure connector J1/SENSOR B is firmly plugged into the heater control
module.
 Check connections between the temperature control module and the heater over
temperature switches and the "A" & "B" temperature sensor. Make sure all of the
wires are securely connected into connector J1/SENSOR B.
 Check continuity of the over temperature switches and the "A" & "B"
Thermocouples by removing the J1/SENSOR B connector from the temperature
control module socket. On the plug end check the resistance across pins 1 & 2 =
nearly Zero ohms, pins 3 & 4 = nearly Zero ohms. Pins 5 & 6 = 4 - 6 ohms. Pins
8 & 9 = 4 - 6 ohms. Pins 6 & 9 to chassis ground as "OL" open loop at ambient
temperature.
Rev 2.6 (02/2014) Page 10