Broken Wire Detection On Temperature Sensor; Base Heater On/Off Output Control (Option); Reverse Operation Start For Compressor Protection; Heating Low Outdoor Temperature Protective Control - Mitsubishi Heavy Industries FDF71VNXWVH Service Manual

6. To remove the electronic expansion valves (example"EEVC")
(1) Remove the service panel and rear panel.(See No.1,2.)
(2) Disconnect the EEVC connector(CNEEV1) on PCB in control box.
(3) Remove the EEVC coil wiring fixing bands.
(3) Remove the EEVC coil by pull out on the top.
(4) Remove welded part of EEV by welding. (
7. To remove the high pressure switch (63H)
(1) Remove the service panel and rear panel.(See No.1,2.)
(2) Disconnect the 63H connector(CNH) on PCB in control box.
(3) Remove the high pressure switch wiring fixing bands.
(4) Remove the metal fitting fixing screws and remove metal fitting.( ← mark)
(5) Remove welded part of high pressure switch by welding. ( □ mark)
10. To remove the compressor (CM)
(1) Remove the service panel and rear panel.(See No.1,2.)
(2) Remove front cover fixing screw and remove front cover.( ← mark, Pic.①)
(3) Remove 3 side cover fixing screws and remove side cover.( ← mark, Pic.②)
(4) Remove the insulation ((a) ー (d), Pic.③) which covers compressor. (Strings (b) ー (d), Pic.③ should be loosen.)
(5) Remove 3 terminal cover fixing bolts( ← mark, Pic.③) and remove terminal cover
and disconnect the power wirings.
(6) Remove the crankcase heater.
(7) Pull out the temperature sensor"Tho-H" from the sensor holder.
(8) Remove the insulation ((e),(f), Pic.③) which covers welded part.
(9) Remove welded part of compressor by welding.( □ mark, Pic.④)
(10) Remove 3 oil separator fixing screws and remove oil separator.( ← mark, Pic.⑤)
(11) Remove 3 compressor fixing nuts( 〇 mark, Pic.④) using spanner or adjustable wrench.
①
②
□
mark)
8. To remove bypass valves (example"SV1")
(1) Remove the service panel.(See No.1.)
(2) Disconnect the SV1 connector(CNF) on PCB in control box.
(3) Remove the coil of SV1 wiring fixing bands.
(4) Remove 3 coil of SV1 fixing screws and remove coil .( ← mark)
(5) Remove welded part of SV1 by welding.( □ mark)
9. To remove the temperature sensors (example"Tho-D")
(1) Remove the service panel.(See No.1.)
(2) Remove the insulation which covers Tho-D.
(3) Disconnect the Tho-D connector(CNTH) on PCB in control box.
(4) Remove the Tho-D wiring fixing bands.
(5) Pull out the temperature sensor"Tho-D" from the sensor holder.
③
(e)
(a)
(b)
(f)
(c)
(d)
EEV
④
Crankcase heater
Tho-H
217
- -
'22 • PAC-SM-426
Coil of EEVC
⑤