Mitsubishi Electric PUHY-RP200 Service Handbook page 257

[ IX Troubleshooting ]
1. Plate heat exchanger ASSY replacement instructions
* Following instructions show procedures for replacing service parts for Plate heat exchanger ASSY .
1 1 . Applicable models
• PUHY-RP200,250,300,350YJM-B(-BS)
2. Service parts list
Part
Plate heat exchanger ASSY
3. Procedures
*Precautions for starting replacement
•
Check that the main power supply is OFF.
•
Check that no refrigerant is in the outdoor unit.
Remove each part according to the 1)-3) procedures on the figure
above right before replacing service parts.
Mount the removed parts back in place in a reversed procedure
of 1)-3) on the figure above right after replacing service parts.
To remove Plate heat exchanger ASSY
●
Remove the solenoid valve coil cover, solenoid valve coil(SV3,SV5b,SV8,SV9), and linear expansion valve(LEV1,SLEV).
Remove the relay connector of the pressure switch(63H2).
Remove the peripheral cables(TH3,TH6).
Remove the rod holder for check joint (CJ3) fixation.
Remove the attachment valve (M5X7) .
Debraze A-E parts (total 5 places).
Do not damage heat exchanger fins and peripheral piping devices
when removing the Plate heat exchanger ASSY.
Cut the piping of the (a) part, Debraze the (b) (c) part, and replace the Plate heat exchanger ASSY.
φ
(b)Debraze 12.7
30
φ
(c)Debraze
(a)Cutting pipes positions
Cutting in 30mm from bend part
To install Plate heat exchanger ASSY
●
Mount the Plate heat exchanger ASSY replacement to the unit
with care not to damage heat exchanger fins and peripheral piping devices.
Replace the attachment valve, and fix valve (BV1,BV2) and check joint (CJ3).
Braze A-E parts (total 5 places).
Mount the solenoid valve coil cover, solenoid valve coil(SV3,SV5b,SV8,SV9),linear expansion
valve(LEV1,SLEV),pressure switch(63H2), and peripheral cables back in place.
* Precautions for brazing
•
Be sure to perform no-oxidation brazing when brazing.
•
After brazing, check the condition around the brazing. After confirming no leakage, evacuate the air inside.
•
Perform brazing with care of the flame direction so that it does not burn cables and plates etc. in the unit.
HWE10130
Qty.
1
φ
A (
P P late heat exchanger
φ
C ( 12.7)
T T hermistor
(TH3)
Thermistor
(TH6)
D (
12.7
C (
φ
25.4) B ( 12.7)
φ
E ( 6.35)
φ
12.7)
φ
φ
D ( 12.7)
E ( 6.35)
- 248 -
2) Remove the
control box.
3) Remove the cable
that is fixed to the
Frame ASSY MU
(upper) and MB
(lower), and remove
the Frame ASSY MU
and MB.
1) Remove the upper
and lower service
panels (Panel FU
and FB).
φ
12.7)
<Plate heat exchanger ASSY>
φ
B ( 12.7)
φ
A ( 25.4)
Solenoid valve
coil (SV3)
Solenoid valve
coil (SV9)
Solenoid valve
coil (SV5b)
Linear expansion
valve (SLEV)
Solenoid valve
coil (SV8)
Linear expansion
valve (LEV1)
Pressure switch
(63H2)
Attachment valve
Check joint
(CJ3)
GB