Read Before Servicing; I Read Before Servicing - Mitsubishi Electric CMB-WP108NU-AA Service Handbook

[ I Read Before Servicing ]

I Read Before Servicing

[1] Read Before Servicing

1. Check the type of refrigerant used in the system to be serviced.
Refrigerant Type
Multi air conditioner for building application CITY MULTI R2 (E)P-YNU/TNU series: R410A
 Refer to the relevant Service Handbook for maintenance information about the respective outdoor units and heat-source
units.
2. Check the symptoms exhibited by the unit to be serviced.
Refer to this service handbook for symptoms relating to the refrigerant cycle.
3. Thoroughly read the safety precautions at the beginning of this manual.
4. Preparing necessary tools: Prepare a set of tools to be used exclusively with each type of refrigerant.
Refer to "Necessary Tools and Materials" for information on the use of tools.(page 4)
5. Verification of the connecting pipes: Verify the type of refrigerant used for the unit to be moved or replaced.
Use refrigerant pipes made of phosphorus deoxidized copper. Keep the inner and outer surfaces of the pipes clean and free
of such contaminants as sulfur, oxides, dust, dirt, shaving particles, oil, and water.
These types of contaminants inside the refrigerant pipes may cause the refrigerant oil to deteriorate.
6. If there is a leak of gaseous refrigerant and the remaining refrigerant is exposed to an open flame, a poisonous gas
hydrofluoric acid may form. Keep workplace well ventilated.
CAUTION
Install new pipes immediately after removing old ones to keep moisture out of the refrigerant circuit.
The use of refrigerant that contains chloride, such as R22, will cause the refrigerating machine oil to deteriorate.
7. Specifications and system requirements may differ for products manufactured at different times. Refer to the rele-
vant chapters for specification details. Production periods can be found from the serial number as follows.
HWE2206A
CITY MULTI R2 P-ZKMU series: R410A
CITY MULTI WR2 P-YLMU/TLMU/ZLMU series: R410A
...
8 X W
1~9: Jan to Sept.
(Production month)
X~Z: Oct to Dec.
8: April 2018 to March 2019
ex) 8ZP December 2018
81P January 2019
82P February 2019
83P March 2019
94P April 2019
- 3 -
(Production year)
GB