GIA HTW-AT-V100MR290A Manual De Usuario E Instalacion página 94

Emergency
switch off
High pressure
protection (HP
Switch)
Low pressure
protection (LP
Switch)
Over heat
protection (HTP
Switch)
Defrosting
Defrost
indicate
Communication
failure
MAINTENANCE
Maintenance activities
In order to ensure an optimum operation of the unit, a number of checks and inspections on the unit
and the field wiring have to be carried out at regular intervals, preferably yearly.
Check the water supply and air vent frequently, to avoid lack of water or air in the water loop.
Clean the water filter to keep a good water quality. Lack of water and dirty water can damage
the unit.
1) Connecting wire off
EC
2) PCB board failure
1) Too high air inlet
temperature
2) Less water in the tank
3) The electronic expansion
valve assembly blocked
E1
4) Too much refrigerant
5) The switch damaged
6) there is air in the refrigerant
system.
7) PCB board failure
1) Too low air inlet temperature
2) The electronic expansion
valve assembly blocked
3) Too less refrigerant
E2 4) The switch damaged
5) The fan assembly can not
work
6 PCB board failure
1) Too high tank water temp
2) The switch damaged
E3
3) PCB board failure
1）The communication circuit
is loosen
E8
2）PCB board failure
3）Wired controller failure
1) Check the bridge wire
2) Change the PCB board
1) Check if the air inlet temp is
over the working limited
2) Check if the tank is full of
water. If not, charge water
3) Replace the electronic
expansion valve assembly
4) Discharge some refrigerant
5) Replace a new switch
6) Discharge and then recharge
7) Change the PCB board
1) Check if the air inlet temp is
over the working limited
2) Replace the electronic
expansion valve assembly
3) Charge some refrigerant
4) Replace a new switch
5) Check if the fan working
when the compressor working.
If not, some problems with the
6) Change the PCB board
1) If the tank water temp is over
85C, the switch will open and
the unit will stop for protection.
After the water comes to
normal temp, system will
2) Replace a new switch
3) Change the PCB board
4）Check the communication
5）Change the PCB board
6）Change the line controller
40
the refrigerant
fan assembly
recover
circuit connection