Advantage SENTRA SRT-1045-300, Инструкция по эксплуатации

Страница: 46 / 90

Temperature Control Units : Sentra with T300 Control Instrument
Page: 46
Advantage Engineering, Inc.
525 East Stop 18 Road Greenwood, Indiana 46142
317-887-0729 Fax: 317-881-1277
Service Department Fax: 317-885-8683www.AdvantageEngineering.com
4.1 UNIT WILL NOT START (DISPLAY IS NOT ILLUMINATED)
A.
One or more fuses at the main disconnect device are open (blown). Determine continuity
at each fuse. If continuity is not determined, replace the fuse. Then determine cause of
blown fuse.
B.
Control circuit transformer fuse is open (blown). Determine continuity at the control circuit
transformer fuse. If continuity is not determined, replace the fuse.
4.2 UNIT WILL NOT START (DISPLAY ILLUMINATED)
A. Power supply is ON. The operator can determine that electrical power supply to the unit
is “on” when the instrument display is illuminated. Even with the main power supply on,
the unit is prevented from operating by one of the following conditions:
1. Water supply pressure inadequate. The
display shows a yellow Alert : Water Pressure
icon. The unit is prevented from operation
without adequate water supply pressure by
the electrical panel mounted pressure switch.
Sufficient water supply pressure must be
present to close the switch. Refer to Section
2.3 for additional details.
2. Motor overload switch opened. This display
shows a yellow Alert : Motor Overloads icon.
The electric motor is protected from overload
conditions by a set of thermal overload relays.
These relays will open (trip). If the overload
relay is open, it must be reset before operation
can continue. An excessive flow condition must
be isolated and corrected immediately.
3. High temperature limit switch open.
The display shows a yellow Alert : High
Temperature icon. The unit is prevented from
operations at temperatures exceeding 310°F
by a “high temperature limit switch”.
If this switch is open (due to a high
temperature condition), the unit cannot be
started and must “cool down” before the “high
temperature limit switch” will automatically
reset.
4.3 UNIT STOPS
A.
The operator should determine the main power supply to the unit is ON by an illuminated
display. With the main power supply “on”, the unit will be prevented from starting by the
following conditions:
1. Water supply pressure inadequate. The display shows a red Alarm Shutdown
Alert
Water Pressure
Setpoint
200
°F
Setup
Standby
Standby
Yellow Alert Icon showing Water
Pressure Fault
To Process
76
°F
Alert
Motor Overload Setpoint
200
°F
Setup
Standby
Yellow Alert Icon showing Motor
Overload Fault
To Process
76
°F
Alert
Hi Temperature Setpoint
200
°F
Setup
Standby
Yellow Alert Icon showing Motor
Overload Fault