Haier Super Match Series Service Manual

Also see for Super Match 4U30HS2ERA: Service manual

Haier Super Match Series Service Manual Manual pdf 122 page image

Super Match3.2 Outdoor unit control3.2.1 Outdoor frequency controlA. Compressor running frequency range: 3U19:20-100RPS 3U24:20-94RPS, the others are 20~95RPS3.2.2 Electronic expansion valve (EEV) controlA: Electronic characteristicMax. open angle 500 pulseDriving speed PPSB: Standard open angle controlIn Cool/Dry mode, standard open angle: outdoor ambient temp.≥20o C, 250 pulse(E);Outdoor ambienttemp.<20 o C, 210 pulse(E);In Heat mode, standard open angle: outdoor ambient temp.≥10o C, pulse (E);outdoor ambienttemp.<10o C, 210 pulse (E).E. In order to cooperate the compressor discharging temp. over high protection, the system will enlarge theEEV open angle. Within 5 minutes after compressor starts up, it will not modify. The detecting period is 30seconds.Cooling mode Indoor modification angle100 o C +50degree/30seconds, it will stop until up to the max. permittedopening angle90 o C< discharging temp.<=100 o C Keep the angle<=90 o C -5degree/30seconds, and reduce to 0 degree graduallyHeating mode Indoor modification angle100 o C +50degree/30seconds, it will stop until up to the max. permittedopening angle90 o C< discharging temp.<=100 o C Keep the angle<=90 o C -5degree/30seconds, and reduce to 0 degree gradually3.2.3 4-way valve control in heatingMulti: Protection when 4-way valve can not reverse in heating: 10 minutes later after compressor startup, ifindoor coil average temp. is below 15degree and keeps for 1 minute, the unit will stop and occur the 4-wayvalve protection.compressor ONOFF4-way valve ONOFF15 S（E ） 2 minutes and 55s3.2.4 Electric heater controlIf compressor has not run for a long time, the refrigerant will deposit on the bottom of compressor and mix withthe refrigeranr oil. When re-startup, because low pressure reduces, refrigerant will be segregated from therefrigerant oil and cause soam in the oil, which will make compressor exhaust a lot of oil. Therefore please stopheating the compressor bottom to ensure the low pressure in startup period should not go down greatly.• Ambient temp. TA≤27degree, when compressor stops, the electric heater will be electrified.• When TA≥32degree, or compressor running, the electric heater will be off.Heater ONOFFAmbient temp. TA(℃) 27 32121