User's Manual of Fiber Laser Chiller
23
9 Fault analysis and troubleshooting
When the machine detects a fault, the display alternates between the temperature and the
fault code "Exx". If there are multiple faults, press <Up> or <Down> to toggle between the
different faults, press <Up> or <Down> to fix the fault code and then alternate between temperature
and fault code again after 5s. The fault codes and descriptions are listed in the table below:
Table 2 List of fault codes for split controllers
Fault
Code
Fault name
Failure
analysis
Movement
Exclusion
methods
E01 Low temperature
water
Probe failure
A : Low temperature
water probe short circuit
/ disconnection
B : Damaged low
temperature water probe
No pump stop, all
other outputs stop
A: Check for loose
probe wires
B: Replacement probe
E02
Low
temperature
water
High temperature
alarms
A : Insufficient water flow
B : Poor ventilation
C : Too much dust
Stop only low
temperature water
electric heating
A: Testing the water
supply line
B: Clear the
surrounding clutter
C: Cleaning dust from
the condenser
E03
Compressors
Pressure failure
A : Poor ventilation
B : Refrigerant leak
C : Condensing fan not
running
D : Too much dust in the
filter
E : Damaged pressure
switch
Stop the compressor,
not the pump
A: Clear the
surrounding clutter
B: Checking for leaks
C: Check the fan
D: Cleaning the dust
E: Check for loose
pressure switches
and wiring
E04
Phase sequence
alarms
A: Power supply out of
phase / out of phase
B : Phase sequence error
C : Three-phase unbalance
B : Damaged phase
sequence protector
Stop the whole machine
A: Checking the power
supply
B: Arbitrary pairing of
two phase lines
C: Checking the power
supply circuit
D: Replacement of
phase sequence
protector
E05
Low
temperature
water
Flow alarms
A : Blocked low
temperature water line
B : reversed inlet and
outlet connections
C: Leaky suction line
D : Damaged flow switch
No pump stop, all
other outputs stop
A: Clean the lines
B: Check inlet and
outlet lines
C: Check and tighten
the water suction
line
D: Check flow
switch and replace
E06
Water level switch
alarm
A : Insufficient water tank
level
Stop electric heating
of low and normal
temperature water
A: Refill (to level
standard zone)
E07
Compressor
overload
A : Dirty and clogged
condenser
B:Fluorineleakage
C : Blocked air inlet and
outlet
D : Ring temperature too
Stopping the
compressor
A: Cleaning the dust
B: Checking for leaks
C: Clean up debris
around equipment
D: Equipment in a
well ventilated area