∙DC peak current control
o When IPMDC current exceeds set value of 30.0 ± 3.0 A, the compressor will stop.
o If the DC peak current detected within 30 seconds after operation starts, compressor will restart after
1 minute.
oIf the DC peak current detected 30 seconds or more after operation starts, compressor will restart after 2 minutes.
oWithin 30 seconds after compressor restarts, if the DC peak current is exceeded set value continuously for 7 times, all indoor and outdoor relays will be cut off (“F99” is indicated).
∙Error reset can be done by power supply reset.
13.13 Compressor Protection Control (Gas leak detection control 1)
∙Control start conditions
o For 5 minutes, the compressor continuously operates and total current is low. o During Cooling or Soft Dry operation:
Indoor intake temperature — indoor piping temperature is below 39.2°F (4°C). o During Heating operation:
Indoor pipe temperature — indoor intake temperature is below 37.4°F (3°C). o Not during deice control.
o Compressor ON with maximum frequency.
∙Control content
o Compressor stops (and restart after 3 minutes)
o If the conditions above happen 4 times within 60 minutes, the unit will stop operation (“F91” is indicated).
13.14 Compressor Protection Control (Gas leak detection control 2)
∙This control detect gas leakage condition to prevent compressor damage.
∙Control start condition
o All connected indoor units capability supply ON. o Compressor ON with maximum frequency.
o Not during annual cooling.
o Compressor discharge temperature high.
∙Control content
o Compressor OFF during this control (“F91” is memorized in EEPROM)
o If the above conditions happen 2 times within 60 minutes, indoor units’ Timer LED will blinks (“F91” is indicated at all indoor units)
13.15 Valve close detection control
∙This control detects
∙Start conditions:
o For all connected indoor units, if Indoor intake temperature — indoor piping temperature are between 28.4°F
o The first cooling operation is defined as cooling operation is ON for less than 8 minutes after new installation or after pump down.
∙Control content
o During this control, compressor stop, indoor units’ Timer LED will blink. (“F91” is indicated at indoor units)
∙Error reset can be done by power supply reset or reset by using remote control.
13.16 Compressor discharge high pressure protection control
∙This control protect by using high pressure switch during operation.
∙Start conditions
o High pressure switch is activated (from normally close to open) when outdoor operation mode is cooling or heating during compressor running.
∙Control 1 content
o Compressor stop when high pressure switch is opened and restart after high pressure switch closed. If this condition happen 4 times within 30 minutes, “F94” is indicated.
o After 30 minutes, counter is reset if this condition does not happen for 4 times.
∙Control 1 stop conditions o Power supply reset
o Reset by using remote control
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