26
(2) Unlock the mainboard window
Click the “lock” key to unlock the window, it needs to input the password 22 or 022;
11. Failure List & Troubleshooting
11.1. Failure Handling
Issue
Possible cause
Related components
Solution
Unit tripped
when
powered on
Short circuit
Terminals
Relays
Contactors
cables
Check all the components’ connection
Check relays and contactors whether are
broken
Disconnect the electronic components
one by one and powered on to find the
problem
Display
cannot get
power
Cables
has
disconnected
The power input cable
is misconnected
Display cable
Power input cable
Check the display cable
Check the power cable
Check the 3-phase power cable whether
connected in right phase sequence
cannot start
up the unit
The unit have error
Cables
has
disconnected
Display
Cables
Check the display whether shown error
Check the cable
Reconnect the power cable and check if
it works
Display
cannot work
The display has been
locked
The display is broken
Display
Check the display whether shown locked
icon
Check the cable
Reconnect the power cable and check if
it works
Heating
effect is not
good
The
compressor
running low frequency
The fan is not running
or speed is too low
Leakage problem
Compressor
Fan
Refrigerant system
Check the compressor frequency
Check the fan speed
Check the exhaust temperature and low
pressure
Shut
off
while didn’t
reach
the
Temperature
limit
(according to ambient
temperature)
Control logic
Check the parameters
