DC INVERTER MULTI VRF MAINTENANCE
1.2
Display Code on Digital Tube of Outdoor Mainboard
Error
Display
on
Digital
Tube
Display on
Indoor
Unit
Error
Display
on
Digital
Tube
Display on
Indoor
Unit
DC overvoltage
protection
PH E5 Input overcurrent protection PA E5
Module overheat
protection
P8 E5 Jumper fault C5 No display
Current test circuit
fault
Pc E5 Recharging circuit fault PU E5
Module temperature
sensor fault
P7 E5 High-pressure protection E1 E1
Compressor
overcurrent protection
P5 E5 Low-pressure protection E3 E3
DC undervoltage
protection
PL E5 Exhaust protection E4 E4
Compressor startup
failure
Lc E5 Compressor overload protection H3 E5
PFC module
protection
Hc E5
Communication fault (between
indoor / outdoor unit and wired
controller)
E6 E6
Drive resetting and
stop
P0 E5
Outdoor ambient temperature
sensor error
F4 F4
Protection of
compressor against
loss of
synchronization
H7 E5
Indoor coil inlet temperature
sensor error
F5 F5
Compressor
protection against
loss of phase
Ld E5
Indoor coil middle temperature
sensor error
F6 F6
Inverter drive
communication fault
P6 E5
Outdoor coil outlet temperature
sensor error
F7 F7
IPM module
protection
H5 E5
Exhaust temperature sensor
error
F9 F9
1.3 Display of the number of indoor units
Note: You may press down SW3 key of outdoor unit twice continuously within 2s, so that the system will detect
the number of indoor units, in which case the LED1
～LED4 will blink in turn, LED5 and LED6 will become dark.
After 12 seconds, the number of indoor units will be displayed.
Lamp display
Number of indoor
units
LED6 LED5 LED4 LED3 LED2 LED1
1 Dark Dark Dark Dark Dark Bright
2 Dark Dark Dark Dark Bright Dark
3 Dark Dark Dark Dark Bright Bright
4 Dark Dark Dark Bright Dark Dark
5 Dark Dark Dark Bright Dark Bright
6 Dark Dark Dark Bright Bright Dark
： ： ： ： ： ： ：
： ： ： ： ： ： ：
62 Bright Bright Bright Bright Bright Dark
63 Bright Bright Bright Bright Bright Bright
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