Graco Reactor E-10hp Instructions Manual page 33

5. Verify fluid temperature, using an external
temperature sensing device.
120V
Connector Pin
B1 1, 2
B2 1
B2 2
B2 4
B2 5
B2 3
If temperature is too high (sensor reading is 260°F
[127°C] or above):
6. Check if the thermocouples are damaged, or not
contacting the heater element, see F
49.
7. Check if the temperature control module turns off
when the equipment reaches the temperature
setpoint:
a. Set the temperature setpoints far below the
displayed temperature.
b. Turn the zone on. If the temperature rises
steadily, the power board is failing.
c. Verify by exchanging with another power
module. See Replace Temperature Control
Modules, page 46.
d. If the exchanged module does not fix the
problem, the power module is not the cause.
8. Verify the continuity of heater elements with an
ohmmeter. See Test Heater Element, page 48.
332144H
Table 7: Connector B Resistance Measurements
230V
Connector Pin
B1 1, 2
B1 5
B1 6
B1 8
B1 9
B1 3-4,7,10
. 16, page
IG
Description
Overtemperature Switch
Thermocouple ISO, R (red)
Thermocouple ISO, Y (yellow)
Thermocouple RES, R (red)
Thermocouple RES, Y (yellow)
Unused
E02: High zone current
When there is a high current error, the LED on that
zone's module will turn red while the error is displayed.
1. See Before Beginning Repair, page 39.
2. Exchange the zone module with another one. Turn
the zone on and check for an error. If the error
disappears, replace the faulty module.
E03: No zone current
When a no current error occurs, the LED on the specific
zone's module turns red when the error is displayed.
1. Check for a tripped circuit breaker on the Reactor or
at the power source of that zone. Replace the circuit
breaker if it trips habitually.
2. Check for a loose or broken connection at that zone.
3. Exchange the zone module with another one. Turn
the zone on and check for an error. See Replace
Temperature Control Modules, page 46. If the
error disappears, replace faulty module.
4. If E03 occurs for all zones, the contactor may not be
closing. Verify wiring from the heater control to the
contactor coil.
E04: Thermocouple disconnected
1. Check the temperature sensor connections to the
green connectors (B) on the temperature control
module. See Temperature Control Modules
Connections, page 47.
2. Unplug and re-plug the sensor wires.
Troubleshooting
Reading
nearly 0 ohms
4-6 ohms
4-6 ohms
N/A
33