Controller Alarms; C Ont R Oller Al A R M S - Conair Thermolator TW-S User Manual

C on t ro ller Alar ms
When an alarm occurs, the Thermolator has detected a problem with the process. Without correction, the
TCU will not be able to produce process fluid of the correct temperature. Under certain conditions, an
alarm could lead to equipment damage or personal injury if it is not corrected.
• The controller displays an error code indicating the cause of the problem.
Function
• If the optional alarm package is installed, the Fault strobe will illuminate and the audible alarm will
activate.
Alarm
Coolant Pressure Low Timeout
The TCU has experienced either;
1. Too many low pressure alarms
within a certain time period.
2. The TCU has remained tem-
porarily shut down with a low
pressure alarm for too long.
WARNING: Only qualified elec-
trical service personnel should
examine and correct problems
that require opening the unit's
electrical enclosure or checking
electrical current.
u ALARM LED flashes in
conjunction with COOLANT
PRESSURE LOW LED.
u Optional strobe, sounds, dry
contacts actuated.
u Pump turns off.
u Heater turns off.
u Cooling valve closes.
Once you have corrected the
problem, push the alarm si-
lence/reset button to clear this
alarm. Then push the RUN
button to restart the TCU.
6-6 I Tr o u b l e sh o o t i n g
Control Power
Autostart Signal
Pump
Heat
Supply
Cool
Coolant Pressure Low
Display
Venting
Cool
Down
Alarm
Program Mode
OR
(Continued)
Function
Possible Cause
Return
Water pressure in your building
Mold
Purge
is only marginally acceptable to
run the TCU. Any small fluctua-
tions can cause the TCU to cycle
Purge
on and off repeatedly.
Other equipment fed from the
same water line as the TCU is
consuming significant water flow
at intermittent intervals. Due to
the high demand, pressure at the
TCU temporarily drops.
Control Power
Autostart Signal
Pump
Heat
Cool
Coolant Pressure Low
Solution
Venting
Observe the building water pressure
over time. If it drops below the
minimum require pressure, you
will need to upgrade your facil-
Program Mode
ity plumbing, or add an external
booster pump.
Observe the building water pressure
over time. If it drops below the
minimum require pressure, you
will need to upgrade your facil-
ity plumbing, or add an external
booster pump.
If permitted by the manufacturer
of the other equipment, install flow
reducers to the other equipment so
that flow is restricted to a reason-
able level and sufficient pressure is
retained for the TCU.
(Continued)