Panasonic WH-MHF09G3E5 Service Manual

Also see for WH-MHF09G3E5: Planning and installation manual Planning and installation manual Operating instructions Service manual

Contents

5912.2.4 Water Pump Speed Feedback Error Basically pump speed feedback is control by micon. When pump speed is below low limit or over high limit for a few seconds, micon detect pump error andsystem is stopped. Error detection conditions: Current pump speed < 1000 rpm or Current pump speed > 6000rpm for 10 seconds. Control contents: When error occurs, water pump, heating and heater is stopped for 30 seconds then restart again (Retrycontrol). When micon detect error again, system is stopped and error code [H20] is displayed at control panel.12.2.5 Water Pump Only OperationPurposeCirculate and fill the piping with water during installation time Water pump only circulation can be set from the control panel SERVICE S/W when the operation is inStandby Mode. Press the SERVICE S/W for continuous 5 sec to enter Service Mode. In Service Mode, select SR: 02 and press SET S/W to start water pump only operation. 3 way valve turn OFF and 2 way valve turn ON. Water pump will stop operation when H62 is triggered. Press the OFF/ON button to stop the water pump only operation.12.3 Pump Down Operation [Service Mode: 01]PurposeEnsure the pump down operation when relocating or disposing of the unit. The pump down operation will extract allrefrigerant from the piping into the Mono Bloc unit.Controls:1 Press the SERVICE S/W for continuous 5 seconds to enter Service Mode.2 In service mode, select Sr: 01 and press SET S/W to start Pump Down operation.3 There will be no low pressure error and freeze prevention judgement during Pump Down operation.4 3 ways valve will shift to room side and 2 ways valve will turn ON.5 Press OFF/ON button to stop the unit.12.4 Flow Switch12.4.1 Flow Switch Control1 The water flow switch serves as an overload protector that shuts down the unit when the water level isdetected to be low.2 Detection is Lo (0 V) when there is no water flow, and detection is Hi (5 V) when there is water flow.detect time waiting time detect timeError (H20) displayLow limitonPumpPump speedHPHeateroffonoffonoff