27
target
temperature
The
evaporator
has
too
much frost
and cannot
defrosting
cleanly
Fan blade or motor
issue
EEV
step
is
not
suitable
Refrigerant
amount
issue
Parameters issue
Parameters
Fan
EEV
Refrigerant system
Check the defrosting parameters
Check the compressor frequency
Check the fan speed
Check the exhaust temperature and low
pressure
Abnormal
noise
Screws issue
Fan blade or motor
issue
Compressor issue
Components
have
collision
Screws
Fan
Compressor
Other components
(tubes, cables)
Check the screws
Check the fan blade and motor
Check the compressor
Check other components
11.2. Error Code Instruction
Error
code
Error name
Relevant parts
information
Review and resolve
E04
Electric heater
overheat Protection
1. Check the Electrical heating Overheat protector
open or not.
2. Check the Electrical heater.
E08
Communication
failure between PCB
and display
Communication
error between
PCB and
DISPLAY
1. Check cable connection of PCB and DISPLAY.
2. Check the software version of PCB and
DISPLAY.
E11
HP Protection
HP switch is open
1. Check whether showing the error after unit
shutdown.
2. Measure the discharge pressure when unit is
running.
3. Detect EEV step, suction pressure, inlet/outlet
water discharge and suction temp.
4. Release all the gas of the system and refill
refrigerant according to the nameplate.
