34
Eb/E6
(DC motor error)
Diagnosis
Handling
Check whether motor wiring is
reliably connected according to
the nameplate
Yes
Check if there’s 15VDC
Between P8 and P2
Yes
Replace the motor to see if it
is normal after restart?
Re-insert the sensor
according to wiring
nameplate
No
Check if wiring is correct,
replace the mainboard
No
Replace the mainboard
No
P8
(
DC fan typhoon protection(applicable for 48
、
60))
Diagnosis
Handling
Check whether motor wiring is
reliably connected according to
the nameplate
Yes
Check if there’s 15VDC
between P8 and P2
Yes
Whether motor leads to fan
high speed operating because
of external force
No
Whether it reports P8 in
power-off status?
No
Replace the motor
Re-insert the sensor
according to wiring
nameplate
No
If wiring is correct, replace
the mainboard
No
Avoid external motor is
influenced by the
environment directly
Yes
Replace the mainboard
Yes
F4/P0
(
Module radiator temp. Tf protection)
Diagnosis
Handling
If the radiator is damaged or
badly fixed
No
If there’s dust or fallen leaves
influencing radiating
No
Whether the fan and blade can
normally operate
Yes
Whether the duct, including
radiator, is blocked by
debris
No
Whether resistance of Tf is
in the range of TABLE2
Yes
Re-insert Tf, power off and
restart to see if there’s the
same error
Fix the radiator. If
radiator is damaged,
replace it
Yes
Clean radiator duct
Yes
Replace motor or blade
No
No
Replace Tf
No
Troubleshoot surrounding
influence to the duct
Yes
Replace variable
frequency drive
Yes
E5
(
Voltage protection)
Diagnosis
Handling
Whether the power supply
voltage is between 208V-10%
and 230V+10%
Yes
Check if the power supply is reliably
connected, whether the power
supply wire diameter meets
requirements in the manual
Yes
Cut off the power, and wait until
electronic control indicator lamp goes
out, then power on to see whether the
compressor operates normally
Yes
Test if there’s 380Vdc on the
terminals of CN31 when
compressor is operating
Yes
Check if there’s high-
power equipment nearby
Check power supply
to troubleshoot
problems
No
Replace power supply
wire or connect power
supply wire well
No
Replace the mainboard
Replace the mainboard
No
Yes Separate high-power
equipment and power supply
No
Caused by power supply
voltage instantaneous
fluctuation. Recover when
power grid is normal
No
