Servicing And Maintenance - McQuay 5AC 030 CR Manual Del Usuario

When removing the LCD panel from the bracket,
Step 1
Remove the LCD panel
from the bottom part first
with help of a screw driver
1. A 3V DC battery is supplied with the LCD. It is used to ensure that the LCD displays real time once the timer is set.
2. The LCD is wired to the main board via CN8 connection. (This is factory installed)
If the wiring between the LCD and PCB must be longer, an alternative is used. Use a 4-core wire of the desired length and
connect this wire between the terminal block CN2 on the LCD to the terminal block CN5 on the PCB. Ensure that the
correct wire terminals are connected.
3. Networking between chillers can be carried out. Connect the wire as shown
• Servicing
Servicing or maintenance of these units must be carried out by experienced personnel with specific training in refrigeration.
Repeatedly check the safety devices and continuous cycling of control components. These items must be analyzed and
corrected before being reset.
The simple design of the refrigeration circuit totally eliminates potential problems during normal unit operation. No mainte-
nance work is needed on the refrigeration circuit as long as the unit is operating normally.
Ease of maintenance has been taken into consideration during the design stage such that the unit is easily accessible from the
service panels. The electrical components are especially easy to access since it is located in the terminal box in the front
service panel (Figure 14).
Under normal circumstances, these chillers required only a check and cleaning of air intake through the coil surface. These
can be done monthly or quarterly depending on the surrounding where the units are installed.
When the surrounding is very oily or dusty, then the coils must be regularly cleaned by a qualified air condition service
technician to ensure sufficient cooling capacity and efficient unit operation. The normal life span might be shortened if no
proper service is provided.
• Maintenance
For consistent performance and durability, always conduct proper and regular maintenance to the unit.
For prolong period of operation time, the heat exchanger will become dirty impairing its effectiveness and reducing the
performance of the units. Consult your local dealer about the cleaning of the heat exchanger.
No major maintenance or servicing is needed for the internal water circuit in the unit except the water pump failure. It is
advisable to conduct regular check on the filter and change the water filter if it is dirty or choked.
Always check the water level in the system in order to protect the moving components in the hydraulic kit from over heating
and excessive wear.
All manuals and user guides at all-guides.com
Step 2
Factory installed
Main Board Unit 00
A
B
12V
JP13
GND
A B 12V
Alternative wiring between LCD panel and PCB
CN5
A B
12V GND For networking only
PCB Unit 01

SERVICING AND MAINTENANCE

1-6
Remove the
LCD panel
LCD Panel
CN8
CN2
GND