Cooper & Hunter CH-CH10SNM, Service Manual

Page: 17 / 67

15
Mini Chiller
Service Manual
CONTROL
NO. Name Function description
1 Running mode display
: cooling mode, : heating mode
2 Temp display It shows temperature value displays at main display area .
3 Auxiliary display area
It contains 2 numbers and a comma, for showing temperature and number of parameter at main
display area. It only displays when under
Check mode and Parameter checking mode .
4 Main display area
It contains a minus, 2 numbers and 1 temperature unit, for displaying value of temperature and
parameter (temperature or time value) and error code. When temperature value is displayed, it
shows value in algorism and temperature unit; when time is displayed, it shows algorism value
but no temperature unit (default unit is min); when it is code, it displays specific error (refer to
Malfunction Error List ) but no temperature unit. Individual temperature or parameter may exceed
99, then adopt AX for 100
～
109, bX for 110
～
119, CX for 120
～
129, dX for 130
～
139, EX for
140
～
149, FX for 150
～
159, and X stands for a number between 0
～
9. Under normal state, it
shows temperature for back water.
5 Parameter display
It means the value shown at present main display area is parameter. It shows only under
Parameter Check mode.
6 Defrost display It displays when defrosting, otherwise it doesn’t displays.
7 System ID It displays when system or compressor orders, for showing which system is defrosting.
8 Testing display For testing, it displays under compel operation.
9 Error code display
It shows the error code displayed on Main Display Area . It displays when there is error at system
or communication.
Caution:
a. When unit is off, it displays only temperature of back water. When unit is on, under normal state, if there
is no error, it displays temperature of back water, if there is error, it displays error code; when there is no
operation after 60s of pressing the button, it quit back to normal state display automatically.
Auto antifreeze operation display (only for heat pump unit)
b.
When auto antifreeze function is started and relevant conditions are satisfied, unit begins auto antifreeze
operation. At this time, LCD main display area displays code d2 (if there is error it displays error code).
3.3 Installation
a. First select an installation position. According to the size of the communication line of the wire controller,
leave a recess or an embedded wire hole to bury the communication line.
b. If the communication line between the wire controller (85×85×20.4) and the indoor unit is surface-
mounted, use 1# PVC pipe and make matching recess in the wall (refer to Figure 6); If concealed
installation is adopted, 1# PVC pipe can be used (Refer to Figure 7).
c. No matter if surface mounting or concealed mounting is selected, it is required to drill 2 holes (in the same
level) which distance shall be the same as the distance (60mm) of installation holes in the bottom plate of the
wire controller. Then insert a wood plug into each hole. Fix the bottom plate of the wire controller to the wall
by using the two holes. Plug the communication line onto the control panel. Lastly install the panel of the wire
controller.
Caution:
During the installation of the bottom plate of the wire controller, pay attention to the direction of the bottom
plate. The plate’s side with two notches must be at the lower position, and otherwise the panel of the wire
controller cannot be correctly installed.