INVENTOR V1RFI-30, Руководство по обслуживанию

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Check if the voltage at power inlet (plugboard)
of outdoor unit , AC-L1 and N1 of mainboard
on outdoor unit
Check the voltage at two ends of mainboard
CN8 of outdoor unit if both the lights of
mainboard ofoutdoor unit and power module
aren't on after energization
Check if the 5-core connection line of outdoor
unit mainboard and power module is loosening
or poor-contaced
Outdoor unit main-
board malfunction
Replace 5-core
connection line
Communication circuit of outdoor unit main-
board and power module has malfunction
Check power supply circuit
Insert the temp. sensor
properlly
Yes
Yes
No
No
Abnormal
Normal
Normal input
AC 160-220V
When AC 220V input,
voltage at two ends is 310
State 2----- Abnormal power supply ( outdoor unit mainboard LEDs and power module LED are all black)
State 3----- Communication malfunction between outdoor unit mainboard and power module (both D101 and D104
blink 4 times and LED2 is normally on)
4. Outdoor unit temperature sensor malfunction------F3, F4 and F5 are displayed on indoor unit
Checking method:
(1) Check if temperature sensor terminal is plugged stably;
(2) Check if temperature sensor is damaged;
(3) If malfunction still exists after replacement of temperature sensor, replace mainboard.
5. Overload protection of compressor ------H3 is displayed on indoor unit
(1) Possible causes: Poor or excess refrigerant; higher suction temperature resulted from blockage of capillary;
unsmooth operation of compressor, with burning-in of bearing, seizure, or damage of discharge valve; or
protector malfunction
(2) Troubleshooting: Check if the contact of compressor without overheating (top temperature is lower than 90 ć
is conducting with the multimeter; If not, replace the protector; Replace the compressor; Adjust refrigerant
volume; replace capillary.
6. System abnormality ------H4 is displayed on indoor unit
It is overload protection when tube temperature (detect heat exchanger temperature of outdoor unit during cooling
or that of indoor unit during heating) is overhigh.
7. IPM (intelligent power module) protection------H5 is displayed on indoor unit
Checking flowchart
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