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General| Model | YK |
|---|---|
| Type | Centrifugal Chiller |
| Refrigerant | R-134a |
| Frequency | 50/60 Hz |
| Compressor Type | Centrifugal |
| Application | Commercial and Industrial |
| Cooling Capacity Range | 400 to 2, 500 tons |
| Full Load Efficiency | 0.50 to 0.60 kW/ton |
| Efficiency | Varies by model (See specific model data) |
| Operating Temperature Range | Varies by model (See specific model data) |
Details variations in VSOP drive part numbers based on input voltage ranges.
Explains the function and components of the VSOP drive in Model "D" chillers.
Lists common issues encountered with early VSOP drive software and voltage disturbances.
Describes how the Microcomputer Control Center manages oil pressure via the VSOP drive.
Describes safety shutdown conditions related to high oil flow or low oil pressure.
Specifies conditions for daytime high oil flow safety shutdown.
Explains how the oil pump operates after a power failure and system restart.
Details manual control of VSOP drive outputs via diagnostic software.
Explains the meaning of the VSOP drive status LED colors and states.
Describes the function of the VSOP drive okay relay contacts for fault detection.
Lists faults that cause auto-resetting shutdowns, like heatsink overtemp and undervoltage.
Explains overload shutdowns based on high output current over time.
Details overvoltage conditions that cause VSOP drive faults and auto-restart.
Describes faults caused by short circuits on the VSOP drive output.
Details faults occurring when the motor rotor is locked and does not rotate.
Troubleshooting steps for blown fuses or an unlit status LED on the VSOP drive.
Addresses issues when control center shows AUTOSTART and VSOP LED is flashing red.
Troubleshoots control center AUTOSTART with VSOP LED constantly red.
Diagnoses VSOP drive startup failure with a constant red LED.
Troubleshooting steps when oil pressure does not regulate correctly in automatic mode.
Addresses the issue of the VSOP drive shutting down and autostarting daily.
Steps to correct reverse rotation of the oil pump motor.
Explains why motor rotation doesn't change with input wiring modifications on the VSOP drive.
Details the process of oil pressure regulation using the programmed setpoint and VSOP drive speed.
Explains how the VSOP drive can operate at 60 Hz on a 50 Hz installation.
Differentiates between Solid State Starters (SSS) and VSOP drives in motor control.
Provides instructions for using the Remote Keypad Unit with the VSOP drive.
Covers changes for the Mod. "E" chiller regarding the VSD oil pump drive.
States that the VSOP drive in Mod. "E" YK chillers is the same as in Mod. "D".
Details safety shutdown when the pressure setpoint is not met, replacing the "HIGH OIL FLOW" message.
Explains the function of the VSOP drive okay relay and its role in cycling shutdown detection.
Refers to troubleshooting guide for auto-resettable shutdowns on Mod. "D" chillers.
Refers to troubleshooting guide for non-auto-resettable shutdowns on Mod. "D" chillers.
Notes that diagnostic software no longer supports the VSOP drive directly.
Troubleshooting steps for blown fuses or an unlit status LED on the VSOP drive for Mod E.
Addresses AUTOSTART display and flashing red LED on VSOP drive for Mod E.
Troubleshoots AUTOSTART display and constant red LED on VSOP drive for Mod E.
Diagnoses VSOP drive startup failure with a constant red LED for Mod E.
Troubleshooting steps for oil pressure regulation failure in automatic mode for Mod E.
Addresses shutdown due to low differential oil pressure with a green VSOP drive LED.
Troubleshoots daily shutdown and autostart of the VSOP drive.
Steps to correct reverse rotation of the oil pump motor.
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