Panasonic WH-MHF09G3E5 Service Manual

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

Contents

7113. Protection Control13.1 Protection Control for All Operations13.1.1 Time Delay Safety Control1 The compressor will not start for three minutes after stop of operation.13.1.2 30 Seconds Forced Operation1 Once the compressor starts operation, it will not stop its operation for 30 seconds.2 However, it can be stopped using control panel at mono bloc unit.13.1.3 Total Running Current Control1 When the outdoor running current exceeds X value, the compressor frequency will decrease.2 If the outdoor running current does not exceed X value, the compressor frequency will return to normaloperating frequency.3 If the outdoor running current continue to increase till exceed Y value, compressor will stop, and if this occurs3 times within 20 minutes, system will stop operation and OFF/ON control panel LED will blink (F16 erroroccurs).MHF09G3E5 MHF12G6E5Operation Mode X (A) Y (A) X (A) Y (A)Heating 28.0 29.9 28.0 29.9A. DC Peak Current Control1 When the current to IPM exceeds set value of 34 A, compressor will stop. Compressor will restart after threeminutes.2 If the set value exceeds again for more than 30 seconds after the compressor restarts, operation will restartafter two minutes.3 If the set value exceeds again for within 30 seconds after the compressor restarts, operation will restart afterone minute. If this condition repeats continuously for seven times, system will stop operation and OFF/ONcontrol panel LED will blink (F23 error occurs).13.1.4 Compressor Overheating Prevention Control The compressor operating frequency is regulated in accordance to compressor discharge temperature as shownin below figures. When the compressor discharge temperature exceeds 107°C, compressor will stop, and if thisoccurs 4 times within 30 minutes, system will stop operation and OFF/ON control panel LED will blink (F20 erroroccurs).13.1.5 Low Frequency Protection Control 1 When the compressor continuously operates at frequency lower than 21 Hz for 240 minutes, the operationfrequency will change to 20 Hz for 2 minutes.Compressor = OFFFree105°C100°CCompressor discharge temperature102°C107°C106°C98°CCompressorFrequency ReducedCompressorFrequency Maintain