Hydromatic I Chiller Operation Manual
Table Of Contents
- Contents
- Introduction
- System Features
- Operator Controls & Display Panel
- Modes of Operation
- Using the Hydro-matic
- Program Mode
- MAS Settings Not Saved
- Programming Change Notice
- MAS Program Values
- Hydro-Matic Override Toggle Switches
- Trouble Shooting With the Override Toggle Switches
- Program Parameter Table
- Theory of Operation
- Fault Detection and Failsafe Protocols
- Fault Detection and Failsafe Protocols
- Line Voltage Failsafe Protocols
- Sensor Installation Notes
- Applications
- Product Specifications
- Jumper Settings & Part Numbers
- Board Layout and Jumper Locations
- Trouble Shooting Guide
- List of Figures
- List of Tables
PAGE 20
HYDRO-MATIC OPERATIONS MANUAL
REV.03 COPYRIGHT © 1998
FAULT DETECTION AND FAILSAFE PROTOCOLS
When a fault is detected, it is reported and acted upon according to the
programmed failsafe level (P-8). If the service LED is turned on, the
Outlet Temp display will also provide a flashing fault code. If the Hydro-
matic is required to take a compressor off line because of the fault, the
LED for that compressor will flash, indicating that an error has been
detected.
If it is desired that the flashing fault code be removed from the display,
then press the Select button. This does not, however clear the fault or
return the compressor to on line status.
Inlet temperature and Low Voltage faults will result in the complete
shutdown of the system. The system will remain shut down until the faults
are cleared.
A compressor pressure fault (High Freon or Low Oil) is defined to be an
open contact detected on a pressure sensor for a compressor that has been
running at least 15 seconds. A Low Freon Pressure fault is defined to be
an open contact on a pressure sensor for a compressor that has been
running at least 4 minutes.
If the compressors are shut down but not taken off line when the fault
occurs, the Service LED and fault code will be displayed for approxi-
mately 1 second.
Compressor Lockout occurs when three (3) successive pressure faults are
detected during one heating or cooling cycle. At this point, the failed
compressor(s) is (are) taken off line. To clear the fault and return the
compressor(s) back to on line status after the problem has been checked
and corrected, the control must be turned off (ON/OFF button), and then
back on.
LINE VOLTAGE FAILSAFE PROTOCOLS
Line Voltage
The Hydro-matic monitors the input line voltage. This is used to protect
the chiller system hardware and the Hydro-matic.
A-C will be displayed in the Outlet Temp display if the line voltage drops
below the level set with the Line Voltage Limit option (P-13) during
normal operation of the Hydro-matic. All outputs will be shut down until
the voltage rises above the programmed limit.