TECHNICAL & SERVICE MANUAL
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
CONTENTS
1. TECHNICAL CHANGES................................... 2
2. SAFETY PRECAUTION.................................... 3
3. OVERVIEW OF UNITS...................................... 6
4. SPECIFICATIONS........................................... 14
5. DATA................................................................ 16
6. OUTLINES AND DIMENSIONS...................... 19
7. WIRING DIAGRAM......................................... 21
8. NECESSARY CONDITIONS FOR SYSTEM CONSTRUCTION.... 25
9. TROUBLESHOOTING.................................... 27
10. ELECTRICAL WIRING.................................... 75
11. WIRING SPECIFICATIONS............................. 76
12. SYSTEM CONTROL........................................ 77
13. REFRIGERANT PIPING TASK....................... 79
14. DISASSEMBLY PROCEDURE....................... 82
15. PARTS LIST.................................................... 88
16. RoHS PARTS LIST......................................... 95
17. OPTIONAL PARTS.......................... Back cover
INDOOR UNITS COMBINATION SHEETS
OUTDOOR UNIT
BRANCH BOX
No. OC316
REVISED EDITION-E
[Model name]
[Service Ref.]
<Outdoor unit>
MXZ-8A140VA
MXZ-8A140VA
MXZ-8A140VA
1
MXZ-8A140VA
2
MXZ-8A140VA
3
<Branch box>
PAC-AK50BC
PAC-AK50BC
PAC-AK30BC
PAC-AK30BC
PAC-AK51BC
PAC-AK51BC
PAC-AK31BC
PAC-AK31BC
(Indispensable optional parts for MXZ-8A140VA)
Model name
indication
HFC
utilized
R410A
Revision:
• PAC-AK51/31BC are added
in REVISED EDITION-E.
• Some descriptions have
been modified.
•
Please void OC316
REVISED EDITION-D.
April 2010
NOTE:
• This service manual
describes technical data of
outdoor unit and branch box.
As for indoor units, refer to
its service manual.
• RoHS compliant products
have <G> mark on the
spec name plate.
• For servicing RoHS com-
pliant products, refer to the
RoHS PARTS LIST.
