Graco Reactor E-XP1 Troubleshooting Manual page 26

Reactor Error Code Trouble Shooting Guide
4) Material cavitation A or B side.
 Verify feed supply pumps or ball valves are not off.
 That the material drums are not empty.
 That the filter strainers are not restricted.
 That the Reactor pumps are working properly.
(See "If the gauges are not reading equal" section under E24)
5) Material heater stays ON, causing excessive pressure due to thermal expansion.
(See "Heater modules failed to turn off any heat zone, causing a run-a-way condition"
section under E01.
6) On older E-series units, the over pressure switches (Ref. 703) has failed.
Jumper terminal 7 to 10 with kit 246961
Rev 2.6 (02/2014) Page 26