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6. Automatic Control
● Three-minute stop protection
In order to protect the compressor, when the
compressor stops, it can not run in at least 3
minutes. 3 minutes later, the compressor
automatically runs.
●
Three-minute running protection
The compressor should run for at least 3 minutes.
If less than 3 minutes, even though water module
water outlet temperature reaches the set
temperature, the compressor will stop still after 3
minutes. But if the compressor runs less than 3
minutes, the wire controller is used to stop it and
the compressor will be stopped.
● Automatic defrosting function
outdoor unit will automatically detect the frost and
conduct at most 10 minutes’ defrosting.
● Automatic anti-freezing function
In winter, for preventing water pipes and pump
from being broken by freezing, in the shutdown
state, when the water temperature in the water
system is low, system will automatically start the
water pump or electric heating for preventing water
system freezing.
7. Trouble Shooting
● When water module leaks water, stop using it and
contact local dealer.
● When odorous smell is smelt or white smoke emits
from the machine, immediately contact local dealer.
7.1 If Problems Not Solved
If the problems aren’t solved after inspecting the
following items, contact your local dealer and provide
the following information.
(1) Model and name
(2) Failure description
(3) Failure code on the LCD screen
7.2 Water Module Not Running
(1) Check whether the water set temperature is
correct.
(2) Check whether the water system fully vents
air. The dial switch DSW3-2 is dialed to ON and it
can control water pump running, commissioning and
venting air. After commissioning, dial it to OFF, or
else the water pump will continue running.
7.3 Heating Capacity Insufficient
(1) Check whether doors and windows
are open.
(2) Check whether the environmental temperature
is within the running range.
7.4 Solution of Non-failures
(1) After long-time use, dampness bacteria
will grow around water module and affected with
mildew. Clean often and keep good ventilation.
(2) When the machine is running or stopping, it is
normal to hear the refrigerant flow sound.
7.5 Solution of Failures
Table 7.1 can help user and installation and
commissioning personnel to solve some problems.
If the problems cannot be solved, contact your
local dealer.
No. Failures Inspection Trouble shooting
1 no indication, no
response of key
1. check power supply for main board
2. check wire controller and main board wiring
1. re-supply of power
2. replacement of communication cable
2 no indication,
response of key
inspect whether the wire controller’s circuit board polluted
by dust or moisturized
eliminate moisture and dusts by hot air
blower or electric dryer
3 indication, no
response of key
1. check whether the communication cable is the specific
shielded cable of the company
2. check whether the wire controller and the main board
wiring terminal are loose
change the shielded cable
4 unclear indication 1. open the bottom cover of wire controller to check
whether there is dust pollution in the circuit board
2. open the bottom cover of wire controller to check
whether the circuit board is moisturized
1. clean dusts
2. blow by hot air blower or electric dryer
5 backlight not
shining
open the bottom cover of wire controller and remove the
circuit board to check whether there is broken wires in the
backlight power cable
reconnection
6 “03” alarm check whether the wire controller and main board wires
loose or broken
change a new communication cable
Table 7.1
● When water module leaks water, stop using it and
contact local dealer.
When odorous smell is smelt or white smoke emits
from the machine, immediately contact local dealer.
Press the “ ” key to stop the heating. The
ON/OFF
7.6 Electrical expansion valve zero reset
If the water module not be used for long, drain out
circulating water and carry out electrical expansion valve
zero reset procedure before power off. Follow the below
step to carry out electrical expansion valve zero reset
procedure.
(1)Press PSW2 and PSW3 button on main PCB of water
module for three seconds.
(2)The 7-segment will display "EV0000" after finishing
electrical expansion valve zero reset.
Press PSW2 and PSW3 button on main PCB of water
module for three seconds again to cancel the electrical
expansion valve zero reset and displaying "EV0000" on
the 7-segment will disappear.
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