York RecipPak YEAJ44DR7

Questions and Answers

C
Christopher BergerAug 15, 2025
Why is my York RecipPak YEAJ44DR7 showing a 'Low Suction' fault?
- Z
  zedwardsAug 15, 2025
  If your York Chiller is showing a 'Low Suction' fault, adjust per recommended settings and restart the unit. The fault may be caused by improper suction pressure cut-out adjustment, low refrigerant charge, a fouled filter drier, thermal expansion valve adjustment/failure, reduced chilled liquid flow, a defective suction pressure transducer, a fouled compressor suction strainer, or faulty wiring to the transducer.
C
Christopher SmithAug 18, 2025
Why does my York Chiller show a 'High Dsch' fault?
- A
  Alexis DouglasAug 18, 2025
  If your York Chiller cuts out due to high discharge pressure, check the condenser fans, fuses, and contactors. The causes can be in condenser fans not operating or rotating backwards, too much refrigerant, air in the refrigerant system, defective discharge pressure transducer, incorrect Programmable H.P. Cut-out setting, or incorrect OAT sensor reading.
M
Megan JohnsonAug 21, 2025
What to do if my York RecipPak YEAJ44DR7 Chiller displays a 'Low Oil Press' fault?
- M
  martinezwilliamAug 21, 2025
  If you're seeing a 'Low Oil Press' fault on your York Chiller, the oil level should be visible in the sight glass at all times. Add YORK ?C? oil if necessary. The cause may be low oil charge, too much refrigerant in the oil (particularly on start-up), Liquid Line Solenoid Valve (LLSV) not operating, or defective Suction/Oil Pressure Transducer or wiring.
M
Margaret CampbellAug 25, 2025
How to troubleshoot a York Chiller with no display on the panel?
- G
  grace48Aug 25, 2025
  If there is no display on the panel and the York Chiller unit will not operate, check the wiring and fuses (1 FU and 2 FU), and emergency stop contacts 5 to 1. Also, check the wiring from 2T to the Power Supply Board. If these steps don't resolve the issue, replace 2T or the Power Supply Board, or isolate any excessive load on the board. The cause may be no 115VAC to 2T, no 24VAC to the Power Supply Board, a defective 2T with no 24VAC output, or no +12V output from the Power Supply Board.
A
Andrew ThomasAug 27, 2025
What does '?NO RUN PERM?' mean on my York RecipPak YEAJ44DR7 and how do I fix it?
- A
  Allison StuartAug 27, 2025
  If your York Chiller displays a '?NO RUN PERM?' message, check the chilled liquid flow and ensure the flow switch is installed according to the manufacturer's instructions. Replace the flow switch if defective. Also, check any cycling devices connected to terminals 13 & 14 of the TB3 Terminal Block, and ensure the 'System' switch is in the ON position. The issue may be due to no flow, an improperly installed or defective flow switch, a remote cycling device being open, or the 'System' switch being in the OFF position. Place switches to the ON position.
J
Jacob EatonAug 30, 2025
What causes a 'High Ambient Temp' fault on my York RecipPak YEAJ44DR7?
- E
  Eric TurnerAug 30, 2025
  If your York Chiller displays a 'High Ambient Temp' fault, verify the actual ambient temperature at the probe is within +10°F of a thermometer placed next to the OAT sensor. The fault may be caused by the temperature being sensed incorrectly by the thermistor, fans rotating backwards, restricted or re-circulated airflow to the unit, or a high ambient cut-out set too low.
T
Tammy ChambersSep 2, 2025
How to resolve low compressor oil level on York RecipPak YEAJ44DR7?
- V
  Virginia CollinsSep 2, 2025
  If you observe a low compressor oil level, especially during start-up of your York Chiller, ensure the oil level is visible in the sight glass at all times and add YORK 'C' oil if necessary. This issue can be caused by a low oil charge or excessive flood back of liquid refrigerant.
P
prestonshawnSep 5, 2025
What to do if my York RecipPak YEAJ44DR7 Chiller shows a 'Low Water Temp' fault?
- A
  Anne NorrisSep 5, 2025
  If your York Chiller experiences a low water temperature shutdown, and you have RWT Control ONLY, increase flow or increase the control range to match actual evaporator temperature difference. Also check the LWT cut-out point on the panel. The issue may be due to the control range being too small, the LWT cut-out point on panel, or a defective LWT or RWT sensor.
K
Katelyn SmithSep 8, 2025
Why won't the compressor load on my York RecipPak YEAJ44DR7 Chiller?
- M
  Michelle ChavezSep 9, 2025
  If the compressor on your York Chiller won't load, check the operating limitations for excessive load. The causes may be suction pressure greater than the programmed unload point, discharge pressure greater than the programmed load point, insufficient demand, a defective loading solenoid, faulty wiring to the loading solenoid, a defective water temperature sensor, or a defective evaporator/optional discharge transducer.
K
Kristen DavisSep 12, 2025
What does it mean when my York RecipPak YEAJ44DR7 Chiller shows a 'Low Ambient Temp' fault?
- E
  Eric HoltSep 12, 2025
  If your York Chiller displays a 'Low Ambient Temp' fault, no problem exists. The cause can be the temperature of outside air being below the cutout setting, the temperature being sensed incorrectly by the thermistor, or the low ambient temperature Cut-out setting on the display.

Summary

Operational Limitations

Voltage Limitations

Specifies the absolute voltage limitations to prevent compressor damage.

Electrical Data

Single Compressor Power Supply Wiring

Provides electrical data for single compressor power supply, including fuses and wire ranges.

Electrical Data (Continued)

Dual Compressor Power Supply Wiring

Lists electrical data for dual compressor power supply, including fuses and wire ranges.

Wiring Diagrams

Dual Compressor Power Supply Wiring

Shows wiring diagrams for standard units, non-fused disconnect, and single point options.

Elementary Diagram

Presents the elementary diagram showing power supply and system wiring connections.

Installation

Installation Check List

Lists essential checks to perform before placing units into operation.

Installation (Continued)

Chilled Liquid Piping and Electrical Wiring

Electrical Wiring

Details field wiring requirements, NEC compliance, and control panel connections.

Elementary Diagram (Continued)

Control Circuit

Explains the control circuit, power supply, and component connections.

Connection Diagram (System Wiring)

Condenser Fans and Cooler Connections

Shows connection diagrams for condenser fans and cooler components.

Compressors Connections

Illustrates connection points for compressors, including transducers and valves.

System Wiring (Continued)

Compressor Terminal Box Wiring

Provides detailed wiring diagrams for compressor terminal boxes for Z and J compressors.

Connection Diagram, Electrical Box

Electronic and Power Panel Connections

Shows the connection diagram for the electrical box components and panels.

Connection Diagram (Continued)

Disconnect Panel and Single Point Enclosure Wiring

Depicts wiring for disconnect panel and single point enclosure options.

Unit Controls and Operation

York Microcomputer Control Center

Introduces the microprocessor-based control system for multi-circuit chiller control.

Control System Components

Control Panel

DIP Switch Location and Position

Switch Functions

Switch Functions (Continued)

Fault Status Messages

Chiller Faults

Lists chiller-wide fault messages related to ambient, water temp, and voltage.

System Faults

Lists system-specific fault messages for discharge, oil pressure, and suction.

Program Key

Programming User Programmable Safeties and Limits

Introduces programming operating limits like cut-outs and timers.

Discharge Cut-Out Programming

Details how to program the discharge cut-out setting for safety.

Programming Limits

Outside Air Temp Cut-Out Programming

Explains programming for low and high ambient temperature cut-outs.

Discharge Pressure Unload Programming

Details programming the discharge pressure unload point for system protection.

Programming Limits (Continued)

Suction Pressure Unload and Rate Control Temp

Covers programming suction pressure unload and rate control temperature.

Suction Pressure Cut-Out and Rate Sensitivity

Details programming suction pressure cut-out and rate sensitivity.

Anti Recycle Time and Leaving Water Temp Cut-Out

Explains programming anti-recycle time and leaving water temperature cut-out.

Selection of Return or Leaving Chilled Liquid Control

General Control Mode Selection

Explains how to select between Return Water Control and Leaving Water Control.

Setpoints Keys

Programming Setpoints

Programming Return Water Rate Control

Rate Control Temp Programming

Programming Leaving Water Control

Rate Sensitivity Programming

Chilled Liquid Temp;Range Programming (Leaving Water)

Programming Leaving Water Control (Continued)

Low-Limit Water Temperature (LWT) and Control Range (CR)

Rate Control Temp Programming (Leaving Water)

Loading and Unloading

Return Water Temperature Control Loading;Unloading

Leaving Water Temperature Control Loading;Unloading

Loading;Unloading Sequences

Leaving Water Control Loading;Unloading Sequences

System Safeties

Manual Reset Safeties

Explains manual reset safeties that shut down the system upon exceeding thresholds.

Motor Current Safety

Details the motor current safety feature and its operational parameters.

System Safeties (Continued)

Oil Pressure Safety and Discharge Pressure Safety

Covers oil pressure and discharge pressure safety features and their functions.

Pumpdown Safety and Motor Protector

Explains pumpdown safety and the function of the motor protector.

Automatic Reset Safeties

Low Water Temperature Safety

Describes the low water temperature safety and its cut-out programming.

High Ambient and Under Voltage Safety

Covers high ambient and under voltage safety features.

Automatic Reset Safeties (Continued)

Low Ambient Temperature Safety and Flow Switch

Details low ambient temperature safety and flow switch monitoring.

Unit On; Off Switch

Lead;Lag Compressor Selection

Remote Unloading and Setpoint Offset Calculation

Compressor Capacity Control

Compressor Unloading Steps

Loading;Unloading Mechanisms

System Start-Up Checklist

Checking the System 24 Hours Prior to Initial Start-Up (No Power)

Lists essential unit checks to perform before applying power.

Panel Checks (Power On-Both System Switches Off)

Details panel checks, voltage verification, and heater status before start-up.

System Start-Up Checklist (Continued)

DIP Switch Programming and Initial Start-Up

Covers dip switch programming, limit programming, and initial unit operation.

Checking Superheat and Subcooling

Subcooling Check and Example

Explains how to check and record subcooling levels for refrigerant charge verification.

Superheat Check and Example

Details how to check and record superheat for compressor protection.

Operating Sequence

Start-Up Conditions and Lead Compressor Checks

Lag Compressor Checks and Sequencing

Preventative Maintenance

Daily Maintenance

Low Ambient Option Programming and Fan Control

Fan Control Strategies

Hot Gas Bypass (Loadminder) Option

LWT Control Hot Gas Operation

RWT Control Hot Gas Operation and Regulator Setting

Hot Gas Bypass (Loadminder) Option (Continued)

BAS Interface Option (Remote Reset Option)

Troubleshooting Chart

No Display and No Run Perm Faults

Covers troubleshooting steps for units with no display or "No Run Perm" status.

Motor Current and Low Oil Press Faults

Provides solutions for motor current and low oil pressure faults.

Troubleshooting Chart (Continued)

Low Suction and High Dsch Faults

Offers solutions for low suction and high discharge pressure faults.

Chiller Fault: Low Water Temp

Details troubleshooting for low water temperature shutdown and sensor checks.

Compressor Wont Load

Provides solutions for problems where the compressor won't load.

Chiller Fault: High Ambient Temp and Chiller Fault: Low Ambient Temp

Provides steps for diagnosing high and low ambient temperature faults.

Low Compressor Oil Level and Crankcase Heater Issues

Covers low compressor oil level and crankcase heater problems.

Lack of Cooling Effect

Offers troubleshooting steps for lack of cooling effect issues.

York RecipPak YEAJ44DR7 Specifications

General

Model	YEAJ44DR7
Category	Chiller
Cooling Capacity	44 tons
Refrigerant Type	R-410A
Compressor Type	Reciprocating
Number of Circuits	2
Number of Compressors	4
Voltage	460V