Hisense AMS-07UR4SNVT4 Service Manual page 133

6 . TROUBLE SHOOTING
6 . TROUBLE SHOOTING
Error code16（cooling mode）
Anti-freeze protection indoor unit
Is indoor heat exchanger
iced up?
yes
refrigeration system
protection,check the air inlet
and outlet of indoor unit
Error code16（heating mode）
Overload protection indoor unit
Is indoor heat exchanger
overheating?
Yes
refrigeration system
protection,check the air inlet
and outlet of indoor unit
Error code21(cooling
mode)
Outdoor coil anti-
overload protection
Is the outdoor condensor
overheating?
no
Check the coil sensor of
outdoor unit right or not
yes
Change the
outdoor control
board
Check the coil sensor
no
right or not
yes
Change the coil sensor
Check the coil sensor of
no
indoor unit right or not
no
Change the coil sensor
refrigeration system
protection,check the
yes
air inlet and outlet of
outdoor unit
Change the coil
no
sensor
no Change the indoor board
yes Change the indoor board
Error code11
Outdoor EEPROM in
trouble
Check the EEprom
no Refix the EEprom
fixing right or not
yes
Change the
EEprom