York Air-Cooled Chillers
23 fault codes documented
Fault Word 2, Bit 15 — Ckt1 LPT fault
A fault related to the low-pressure transducer (LPT) in Circuit 1.
Fault Word 2, Bit 15 — Ckt2 LPT fault
A fault related to the low-pressure transducer (LPT) in Circuit 2.
Fault Word 2, Bit 15 — Ckt1 HPT fault
A fault related to the high-pressure transducer (HPT) in Circuit 1.
Fault Word 7, Bit 0 — Unit Dial Switch setting error
An error has been detected with the dial switch settings on the unit.
Fault Word 5, Bit 10 — Unit Low LWT in cooling
The Leaving Water Temperature (LWT) from the unit is too low in cooling mode. This suggests a potential freezing condition.
Fault Word 3, Bit 11 — Unit water flow fault
Indicates a fault related to the water flow within the unit itself.
Fault Word 5, Bit 12 — Unit high LWT in heating
The Leaving Water Temperature (LWT) from the unit is too high in heating mode. This could indicate inadequate heat dissipation.
Fault Word 6, Bit 14 — Ckt1 FWV failure
A failure has been detected with the Fan Water Valve (FWV) in Circuit 1.
Fault Word 6, Bit 15 — Ckt2 FWV failure
A failure has been detected with the Fan Water Valve (FWV) in Circuit 2.
Fault Word 7, Bit 1 — Comm failure( unit with driver)
Communication has failed between the unit controller and the Variable Speed Drive (VSD).
Fault Word 8, Bit 2 — Ckt1 High pressure alarm
An alarm condition indicating high pressure in Circuit 1.
Fault Word 8, Bit 3 — Ckt2 High pressure alarm
An alarm condition indicating high pressure in Circuit 2.
Fault Word 8, Bit 4 — Ckt1 Low discharge pressure alarm
An alarm indicating low discharge pressure in Circuit 1. This is unusual and may point to a system issue.
Fault Word 8, Bit 5 — Ckt2 Low discharge pressure alarm
An alarm indicating low discharge pressure in Circuit 2.
Fault Word 8, Bit 6 — Ckt1 Low pressure alarm
An alarm indicating low pressure in Circuit 1, typically suction pressure.
Fault Word 8, Bit 7 — Ckt2 Low pressure alarm
An alarm indicating low pressure in Circuit 2, typically suction pressure.
Fault Word 6, Bit 8 — Ckt1 BPHE anti-freeze protect
The anti-freeze protection for the Brazed Plate Heat Exchanger (BPHE) in Circuit 1 has been activated.
Fault Word 6, Bit 9 — Ckt2 BPHE anti-freeze protect
The anti-freeze protection for the Brazed Plate Heat Exchanger (BPHE) in Circuit 2 has been activated.
Compressor(s) Won’t Start
The compressor(s) on the unit are not starting when expected.
Fan Protect
The fan protection system has been activated, indicating a potential issue with the fan.
High Discharge Pressure or Compressor Overload Fault
This fault indicates that the discharge pressure in the system is too high, or a compressor has tripped due to overload.
Lack of Cooling or Heating Effect
The unit is not providing the expected level of cooling or heating.
Low Liquid Leaving Temp Fault
The temperature of the liquid leaving the unit is lower than the setpoint, potentially causing issues or indicating a problem.