Gree GMV5 VRF Maintenance - Ⅲ. 7. System high pressure protection E1

Ⅲ.Common Troubleshooting and Replacement of Electrical Components
7.System high pressure protection E1
①When E1 appears, please check if the cut-off valves of gas pipe and liquid pipe are fully opened.
②When E1appears, power off and then power on,turn on the units.
③High ambient temperature in operation.
④Pressure sensor is not working properly.
⑤High pressure switch is not working properly.If E1 appears after power on but the compressor doesn’s start up, it means the high pressure switch is not working properly.
⑥The pipeline is blocked.
⑦Excessive refrigerant charging amount. If the above-mentioned causes are excluded please check if the additional refrigerant charging amount is correct.