SiEN34-705
Appendix
General Information
209
7.14.18 High-pressure Shutdown Occurs only when the STD Compressor
Starts.
Applicable
Models
VRV in general
Condition
High-pressure rises abnormally and the high-pressure shutdown results when the STD
compressor starts during cooling operation.
(High-pressure tends to be higher even in the operation of inverter compressor only.)
Temperature of heat exchanger thermistor of outdoor unit was found being equivalent to the
outdoor temperature when data was collected by using the service checker type III.
Cause
Liquid-side stop valve was not fully open.
(The staff considered it was fully open when inspected.)
Measure
Recovers by fully opening the stop valve.
Point of
Diagnosis
Check whether the detecting temperature of heat exchanger thermistor is close to the saturation
temperature being equivalent to the high-pressure.
[Be sure to check all basic items like liquid-side stop valve and electronic expansion valve.]
