User's Manual

Troubleshooting
32 332144C
4. Remove connector B from heater control module
and check continuity of thermocouples by measur-
ing resistance across pins on the plug end.
5. Verify fluid temperature, using an external tempera-
ture sensing device.
If temperature
is too high (sensor reading is 260°F
[127°C] or above):
6. Check if thermocouples are damaged, or not con-
tacting the heater element, see F
IG . 16, page 49.
7. Check if temperature control module turns off when
equipment reaches temperature setpoint:
a. Set temperature setpoints far below displayed
temperature.
b. Turn zone on. If temperature rises steadily,
power board is failing.
c. Verify by exchanging with another power mod-
ule. See Replace Temperature Control Mod-
ules, page 46.
d. If the exchanged module does not fix the prob-
lem, the power module is not the cause.
8. Verify continuity of heater elements with an ohmme-
ter, see page 48.
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 zone module with another one. Turn
zone on and check for error. If error disappears,
replace 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 tripped circuit breaker on Reactor or at
power source of that zone. Replace circuit breaker if
it trips habitually.
2. Check for loose or broken connection at that zone.
3. Exchange zone module with another one. Turn
zone on and check for error (see page 46). If error
disappears, replace faulty module.
4. If E03 occurs for all zones, the contactor may not be
closing. Verify wiring from heater control to contac-
tor coil.
E04: Thermocouple disconnected
1. Check temperature sensor connections to green
connectors (B) on temperature control module. See
Temperature Control Modules Connections,
page 47.
2. Unplug and re-plug sensor wires.
Table 7: Connector B Resistance Measurements
120V 230V
Description
Reading
Connector Pin Connector Pin
B1 1, 2 B1 1, 2 Overtemperature Switch nearly 0 ohms
B2 1 B1 5 Thermocouple ISO, R (red)
4-6 ohms
B2 2 B1 6 Thermocouple ISO, Y (yellow)
B2 4 B1 8 Thermocouple RES, R (red)
4-6 ohms
B2 5 B1 9 Thermocouple RES, Y (yellow)
B2 3 B1 3-4,7,10 Unused N/A