On the display
The control center shows Condenser - High Pressure - Stopped. The manuals for this chiller also print the same message as Condenser - High pressure - Stopped. It is listed among the safety fault messages and is the "Stopped" variant of the condenser high pressure shutdown.
What it means
This is an anticipatory safety fault: while the chiller is stopped, the condenser pressure has risen above the stopping threshold — 160.0 PSIG, or 240.0 PSIG on R22. The manual explains why the control watches for this during shutdown: condenser water at high temperature flowing through the condenser while the unit is shut down can build a condenser high pressure condition, and refrigerant can be lost as a result. The fault announces the condition in advance so that loss can be prevented. The manual notes this anticipatory fault applies only while the chiller is stopped.
Why it appears
- With the chiller stopped, the condenser pressure rises above 160.0 PSIG (240.0 PSIG with R22).
- Condenser water at high temperature flowing through the condenser during shutdown builds that pressure and the refrigerant charge can be lost — the fault exists to anticipate this problem.
Setpoints and thresholds
- Trip point while stopped: condenser pressure above 160.0 PSIG (240.0 PSIG with R22).
- Before a restart is possible, the condenser pressure must fall to less than 160.0 PSIG (240.0 PSIG with R22).
- For extended condenser temperature applications the trip/reset values are 170/170 PSIG.
- For high temperature heat pump applications the trip/reset values are 358.0 PSIG/358.0 PSIG.
- The CONDENSER TEMPERATURE RANGE setpoint governs this: at "Extended" the trip/reset threshold is 170 PSIG; at "Standard" it is unchanged.
Reset and restart
Restart is possible only once the condenser pressure has dropped below the threshold above and a service technician has carried out the special reset procedure:
- Set the COMPRESSOR switch to the Stop-reset position.
- Log in at the keypad at Service access level using the entry code the manual prints for this procedure.
- Open the COMPRESSOR screen.
- On the COMPRESSOR Screen, press the FAULT ACKNOWLEDGE key — a dialog box appears asking for
Enter Password to Clear Fault
. Enter 1 3 9 7 and press the ENTER key (√)
.
Questions engineers ask
What does Condenser - High Pressure - Stopped mean on a YORK YK chiller?
It is an anticipatory safety fault: the condenser pressure went above 160.0 PSIG while the chiller was stopped (240.0 PSIG with R22). Condenser water at high temperature during shutdown can create this condition, and the refrigerant charge can be lost — the fault warns before that happens.
How is the Condenser - High Pressure - Stopped fault reset on a YORK YK?
First let the condenser pressure fall to less than 160.0 PSIG (240.0 PSIG with R22). Then set the COMPRESSOR switch to Stop-reset, log in at Service access level at the keypad, open the COMPRESSOR screen, press FAULT ACKNOWLEDGE, and enter 1 3 9 7 at the password dialog, confirming with the ENTER key.
What pressure trips the YORK YK condenser high pressure fault while stopped?
160.0 PSIG in standard applications, or 240.0 PSIG with R22. With the CONDENSER TEMPERATURE RANGE setpoint on Extended, the trip/reset threshold is 170 PSIG, and high temperature heat pump applications trip and reset at 358.0 PSIG.
Can a YORK YK restart on its own after Condenser - High Pressure - Stopped?
No. A restart requires a service technician to carry out the special reset procedure, and the condenser pressure must already be below the trip threshold.
Messages next to this one
Source
Written from the manufacturer's manuals for the YORK YK; every number and designation on this page is checked against them before publication. The row of the manual this message comes from:
All YORK YK messages: fault codes · YORK YK documentation · YORK manuals