Primary
Primary
Primary Heater
Heater
Heater
Before performing any troubleshooting procedures:
1.
Follow
Pressure Relief Procedure, page 48
2.
Turn main power switch 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
controls are properly set and wiring is correct before
assuming there is a problem.
Problem
Problem
Problem
Cause
Cause
Cause
Solution
Solution
Solution
Heat turned off.
Turn on heat zones.
Temperature control alarm.
Check ADM for error codes.
Primary Heater(s) does not heat.
Signal failure from RTD.
Check ADM for error codes.
Confirm RTD cabling is properly
connected and not damaged.
Replace RTD.
Dirty RTD connections.
Examine RTD cables connected
to TCM. Confirm RTDs are
not plugged into opposite heat
zone. Unplug and re-plug RTD
connectors. Unplug and re-plug
RTD connectors. Ensure RTD tip
contacts the heater element.
RTD not contacting heater
element.
Loosen ferrule nut, push in RTD
so tip contacts heater element.
Holding RTD tip against heater
element, tighten ferrule nut 1/4
turn past tight.
Failed heater element.
See
Replace Heater Element, page 58
Control of primary heat is
abnormal; high temperature
overshoots (T4DA, T4DB) occurs
intermittently.
Signal failure from RTD.
See (T6DA, T6DB),
.
46
334946C