Primary
Primary
Primary Heater
Heater
Heater
Before performing any troubleshooting
procedures:
1. Follow
Pressure Relief Procedure, page 49
.
2. Turn the 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
Control of primary heat is
abnormal; high temperature
overshoots (T4DA, T4DB)
occurs intermittently.
Signal failure from RTD.
See (T6DA, T6DB),
.
334946J
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