Gas Depletion Alarm - Panasonic Urban Multi MX1R Series Service Manual

PACD011001C2
1.19

Gas Depletion Alarm

An alarm (U0) is given for severe gas depletion. Alarm is indicated but operation continues.
When cooling
When heating
Function Urban Multi "MX1, ME1 Series" Using R-22
While compressor is running
and
Low pressure < 1.0 kg/cm ²
Gas depletion alarm cancellation
While compressor is running
and
4-way valve ON (heating cycle)
and
Evaporator outlet superheat
temperature > 20˚C difference
and
Outdoor unit electronic expansion
valve = 2000 pulses (completely open)
Gas depletion alarm cancellation
Conditions given on the
left continue for 30 min.
Conditions given on the
left continue for 60 min.
Function
Gas depletion alarm (U0) is displayed.
Compressor off
or
Low pressure Lp ≥ 1.0 kg/cm ²
(VF008)
Gas depletion alarm (U0) is displayed.
Compressor off
or
4-way valve OFF (cooling cycle / defrost)
or
Evaporator outlet superheat
temperature ≤ 20˚C difference
or
Outdoor unit electronic expansion
valve < 2000 pulses (Fully open)
(VF009)
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