Graco 312066z Manuale Utente

Pagina di 74
Troubleshooting 
20
312066Z
Primary Heaters (A and B)
Before performing any troubleshooting procedures:
1.
Relieve pressure, page 23.
2.
Turn main power OFF 
.
3.
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 8.
Signal failure from thermocouple.
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. Unplug and re-plug long 
green connector.
Thermocouple not contacting heater 
element.
Loosen ferrule nut (N), push in ther-
mocouple (310) so tip (T) contacts 
heater element (307). Holding themo-
couple tip (T) against heater element, 
tighten ferrule nut (N) 1/4 turn past 
tight. See page 42 for illustration.
Failed heater element.
See Primary Heaters, page 20.
Signal failure from thermocouple.
Thermocouple wired incorrectly.
See E04: Fluid Temperature Sen-
sor (FTS) or thermocouple discon-
nected
,
 page 10. Power up zones 
one at a time and verify that tempera-
ture for each zone rises.
A
B