User's Manual

Troubleshooting
332144C 35
Heaters
Before performing any troubleshooting procedures:
1. Shut off Heater Power.
2. Shut off Motor Power.
3. Relieve pressure, page 23.
4. Allow equipment to cool.
Try the recommended solutions in the order given for
each problem, to avoid unnecessary repairs. Also,
determine that all circuit breakers, switches, and con-
trols are properly set and wiring is correct before assum-
ing there is a problem.
PROBLEM CAUSE SOLUTION
Primary heater(s) does not heat. Heat turned off.
Press or zone
keys.
Temperature control alarm. Check temperature display for diag-
nostic code, page 31.
Signal failure from thermocouple. See E04: Thermocouple discon-
nected, page 32.
Failed heater element. Check resistance of heater elements.
See Test Heater Element, page 48.
Control of primary heat is abnormal;
high temperature overshoots or E01
error occurs intermittently.
Dirty thermocouple connections. Examine connection of thermocou-
ples to long green plug on heater
control board. Unplug and re-plug
thermocouple wires, cleaning off any
debris. For 120V, unplug and re-plug
long green connector. For 230V,
unplug and re-plug green connec-
tor(s) B.
Thermocouple not contacting heater
element.
Loosen ferrule nut (N), push in ther-
mocouple (310) so tip (T) contacts
heater element (307). Holding ther-
mocouple tip (T) against heater ele-
ment, tighten ferrule nut (N) 1/4 turn
past tight. See page 49 for illustra-
tion.
Failed heater element. See Heaters, page 35.
Signal failure from thermocouple. See E04: Thermocouple discon-
nected, page 32.
Thermocouple wired incorrectly. See E04: Thermocouple discon-
nected, page 32. Power up zones
one at a time and verify that tempera-
ture for each zone rises.