Panasonic PAPAMY1702034CE - Compressor Protection Control (Gas Leak Detection Control 2); Valve Close Detection Control; Compressor Discharge High Pressure Protection Control; Compressor Discharge High Temperature Protection Control

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14.14 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)
14.15 Valve close detection control
 This control detects 3-way valve close condition to prevent damage to refrigerant cycle.
 Start conditions:
o For all connected indoor units, if Indoor intake temperature — indoor piping temperature are between -2°C
and 2°C continuously for 5 minutes after compressor ON at first cooling operation.
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.
14.16 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
14.17 Compressor discharge high temperature protection control
 This control detect compressor discharge tube (CU-4Z68/3Z68/3Z52TBE)/compressor tank temperature
(CU-2Z35/41/50TBE) and perform the compressor frequency restriction.
CU-2Z35/41/50TBE CU-3Z52/3Z68/4Z68TBE
A 108°C 108°C
B 96°C 96°C
C 95°C 90°C
D 90°C 85°C
 When the discharge temperature more than 108C, the compressor stops. If this condition happens for 3 times
within 30 minutes, “F97” is indicated.
Comp stop
108°C
95°C
96°C
90°C
Comp freq
restricted
Comp freq free
Comp disc temp (CU-4Z68/3Z68/3Z52TBE) o
r
Comp tank temp (CU-2Z35/41/50TBE)