Mitsubishi Electric PAA-A Series Air Conditioner Service Parts Manual
Manufactured by: MITSUBISHI ELECTRIC US, INC.
Applicable Models: Mitsubishi Electric PAA-A Series (Models: PAA-A18, PAA-A24, PAA-A30, PAA-A36, PAA-A42)
1. External Parts
Diagram illustrates the exterior components of the air conditioner unit. Numbered parts include various TOP COVER ASSY (1), FRONT PANEL ASSY (2), LEFT PANEL ASSY (3), BACK PANEL ASSY (4), RIGHT PANEL ASSY (5), SCREW H 5X10 KNURLED (6), PANEL PIPE ASSY (7, 8, 9), SENSOR BRACKET (10), THERMISTOR 8MM (11), FLOAT SWITCH + LEAD WIRE ASSY CN4F (12), LEAD WIRE ASSY CN4F (13), THERMOSTAT (NAT) (14), ACCESSORY BAG, PAA L (15), and BRACKET (16). A 'DETAIL A' callout highlights parts used in multiple locations. A critical note states the original nameplate must be transferred to the new front panel, and model/serial numbers should be recorded beforehand.
| Service Part No. | Part Name | Symbol in Wiring Diagram | Quantity per unit PAA-A | Remarks | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 18AA1 | 18BA1 | 24AA1 | 24BA1 | 30AA1 | 30BA1 | 36BA1 | 36CA1 | 42BA1 | 42CA1 | |||||
| U41 011 668 | TOP COVER ASSY 14.5 | 1 | ||||||||||||
| U41 012 668 | TOP COVER ASSY 17.5 | 1 | ||||||||||||
| U41 013 668 | TOP COVER ASSY 21 | 1 | ||||||||||||
| U41 006 639 | FRONT PANEL ASSY 14.5M | 1 | ||||||||||||
| U41 007 639 | FRONT PANEL ASSY 17.5M | 1 | ||||||||||||
| U41 008 639 | FRONT PANEL ASSY 17.5L | |||||||||||||
| U41 009 639 | FRONT PANEL ASSY 21L | 1 | ||||||||||||
| U41 023 638 | LEFT PANEL ASSY, MED | 1 | 1 | 1 | 1 | |||||||||
| U41 024 638 | LEFT PANEL ASSY, LARGE | 1 | 1 | 1 | 1 | |||||||||
| U41 019 638 | BACK PANEL ASSY 145M | 1 | ||||||||||||
| U41 020 638 | BACK PANEL ASSY 175M | 1 | ||||||||||||
| U41 021 638 | BACK PANEL ASSY 175L | |||||||||||||
| U41 022 638 | BACK PANEL ASSY 21L | 1 | ||||||||||||
| U41 025 638 | RIGHT PANEL ASSY, MED | 1 | 1 | 1 | 1 | |||||||||
| U41 018 638 | RIGHT PANEL ASSY, LARGE | 1 | 1 | 1 | 1 | |||||||||
| U41 008 087 | SCREW H 5X10 KNURLED | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | Pack of 10 | ||
| U41 013 635 | PANEL PIPE ASSY | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |||
| U41 011 635 | PANEL PIPE ASSY | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |||
| U41 012 635 | PANEL PIPE ASSY | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |||
| U71 001 086 | SENSOR BRACKET | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |||
| U71 002 200 | THERMISTOR 8MM | TH1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | ||
| U41 003 541 | FLOAT SWITCH + LEAD WIRE ASSY CN4F | CN4F | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | This part is included in U41003541, Float Switch + LEAD WIRE service part kit. Also included in Accessory Bag, Item 15 | |
| U41 015 392 | LEAD WIRE ASSY CN4F | CN4F | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | Also included in Accessory Bag, Item 15 | |
| U41 010 200 | THERMOSTAT (NAT) | Terminal Block B | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | ||
| U41 009 818 | ACCESSORY BAG, PAA L | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |||
| U41 004 130 | BRACKET 14.5 | 1 | Also included in Accessory Bag, Item 15 | |||||||||||
| U41 005 130 | BRACKET 17.5 | 1 | Also included in Accessory Bag, Item 15 | |||||||||||
| U41 006 130 | BRACKET 21 | 1 | Also included in Accessory Bag, Item 15 | |||||||||||
Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
2. HEX Assembly Parts
Diagram shows the Heat Exchanger (HEX) assembly. Numbered parts include DRAIN PAN ASSY TOP (1), PLUG-TOP DRAIN PAN (2), HOSE-TOP DRAIN PAN (3), PLATE GUIDE REAR S/M (4, 5), SIDE PAN BRACKET S/M (6, 7), DRAIN PAN ASSY SIDE S/M (8, 9), THERMISTOR LIQUID/GAS PIPE SENSOR ASSY (10, 11) connected via CN44, and DRAIN PAN ASSY LOWER S/M (12, 13), PLATE GUIDE FRONT S/M (14, 15). Callouts A and B indicate specific connection points. Remarks mention connection via an adapter harness and inclusion of all HEX parts for certain models.
| Service Part No. | Part Name | Symbol in Wiring Diagram | Quantity per unit SVZ-KP | Remarks | ||||
|---|---|---|---|---|---|---|---|---|
| 12NA | 18NA | 24NA | 30NA | 36NA | ||||
| U41 012 529 | DRAIN PAN ASSY TOP | 2 | ||||||
| U41 002 558 | PLUG-TOP DRAIN PAN | 4 | ||||||
| U41 001 525 | HOSE-TOP DRAIN PAN | 2 | ||||||
| U41 001 668 | PLATE GUIDE REAR S | 1 | ||||||
| U41 002 668 | PLATE GUIDE REAR M | 1 | ||||||
| U41 001 662 | SIDE PAN BRACKET S | 1 | ||||||
| U41 002 662 | SIDE PAN BRACKET M | 1 | ||||||
| U41 009 529 | DRAIN PAN ASSY SIDE S | 1 | ||||||
| U41 010 529 | DRAIN PAN ASSY SIDE M | 1 | ||||||
| U41 006 200 | THERMISTOR LIQUID/GAS PIPE SENSOR ASSY | TH2/TH5 (CN44) | 1 | 1 | 1 | 1 | 1 | Connects to CN44 via adapter harness in Cabinet Left panel. See Control Box Parts for Adapter Harness. Includes 2 Thermistor on Common Harness. |
| U41 008 200 | THERMISTOR LIQUID/GAS PIPE SENSOR ASSY | TH2/TH5 (CN44) | 1 | 1 | 1 | 1 | 1 | |
| U41 006 529 | DRAIN PAN ASSY LOWER S | 1 | Includes all HEX parts | |||||
| U41 007 529 | DRAIN PAN ASSY LOWER M | 1 | Includes all HEX parts | |||||
| U41 004 668 | PLATE GUIDE FRONT S | 1 | Includes all HEX parts | |||||
| U41 005 668 | PLATE GUIDE FRONT M | 1 | Includes all HEX parts | |||||
| U41 002 122 | NUT FLARE 3/8 | 1 | 1 | 1 | 1 | 1 | ||
| U41 004 122 | NUT FLARE 1/4 | 1 | 1 | 1 | 1 | 1 | ||
| U41 002 122 | NUT FLARE 3/8 | 1 | 1 | 1 | 1 | 1 | ||
| U41 003 122 | NUT FLARE 1/2F | 1 | 1 | 1 | 1 | 1 | ||
| U41 001 122 | NUT FLARE 5/8 | 1 | 1 | 1 | 1 | 1 | ||
| U41 026 480 | HEAT EXCHANGER KP12 | 1 | ||||||
| U41 027 480 | HEAT EXCHANGER KP18 | 1 | ||||||
| U41 028 480 | HEAT EXCHANGER KP24 | 1 | ||||||
| U41 029 480 | HEAT EXCHANGER KP30 | 1 | ||||||
Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
3. Control Box Parts
Diagram displays the components within the control box. Numbered parts include Control Box Assy (1), SCREW WFT 5X12 (2), CONTROL BOX COVER (3), BUSHING (4), SCREW M4 x 8 (5), LEAD WIRE ASSY CNH04 (6), CNH07 (7), CN22 (8), PCBA IDU CTL BRD (9), SCREW M4 x 10 (10), CLIPS & SUPPORTS (11), PCA INDOOR POWER (12), LEAD WIRE ASSY POWER (13), SCREW M4 X20 (14), TERMINAL BLOCK, BED, LABEL KIT (15), LEAD WIRE ASSY CNH01 (16), PAA RELAY AND UI BD ASSEMBLIES (17), CNH05 (18), CNH06 (19), CNH03 (20), and FUSE 250mA (21). Remarks specify pack quantities, field-supplied items, and cross-references.
| Service Part No. | Part Name | Symbol in Wiring Diagram | Quantity per unit PAA-A | Remarks | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 18AA1 | 18BA1 | 24AA1 | 24BA1 | 30AA1 | 30BA1 | 36BA1 | 36CA1 | 42BA1 | 42CA1 | |||||
| U41 005 812 | Control Box Assy 18 | 1 | ||||||||||||
| U41 006 812 | Control Box Assy 24 | 1 | ||||||||||||
| U41 007 812 | Control Box Assy 30 | 1 | ||||||||||||
| U41 008 812 | Control Box Assy 36 | 1 | ||||||||||||
| U41 009 812 | Control Box Assy 42 | 1 | ||||||||||||
| U41 010 087 | SCREW WFT 5X12 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | Pack of 10 | ||
| U41 010 812 | CONTROL BOX COVER | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |||
| U41 003 104 | BUSHING | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |||
| U41 019 392 | SCREW M4 x 8 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | Pack of 2 | ||
| U41 022 392 | LEAD WIRE ASSY CNH04 | CNH04 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | ||
| U41 023 392 | LEAD WIRE ASSY CNH07 | CNH07 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | ||
| U41 012 280 | LEAD WIRE ASSY CN22 | CN22 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | ||
| U41 001 145 | PCBA IDU CTL BRD | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |||
| U41 005 280 | SCREW M4 x 10 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | Pack of 2 | ||
| U41 024 392 | CLIPS & SUPPORTS | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | Pack of 5 each: clips & supports. | ||
| U41 006 246 | PCA INDOOR POWER | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |||
| U41 016 392 | LEAD WIRE ASSY POWER | CND | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | ||
| U41 001 225 | TERMINAL BLOCK, BED, LABEL KIT | Terminal Block A, Terminal Block B, Terminal Block C | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | Includes qty 1 terminal bed, qty 2 Terminal Blocks, qty 1 label | |
| U41 020 392 | LEAD WIRE ASSY CNH01 | CNH01 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | ||
| U41 021 392 | PAA RELAY AND UI BD ASSEMBLIES | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |||
| U41 018 392 | LEAD WIRE ASSY CNH05 | CNH05 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | ||
| U41 002 239 | LEAD WIRE ASSY CNH06 | CNH06 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | ||
| U41 015 392 | LEAD WIRE ASSY CN4F | CN4F | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | This part is shown in the External Service Parts section. It is available individually, as part of the Float Switch + LEAD WIRE kit, and as part of the Accessory Bag. | |
| U41 016 392 | FUSE 250mA | FH01 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | Pack of 10 | |
Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
Optional Items
| Part Name | Part Number | Symbol in Wiring Diagram | Models | Remarks |
|---|---|---|---|---|
| LEAD WIRE ASSY CNH02 | U41 017 392 | CNH02 | Optional use with all PAA Models | Optional for connection to Thermostat Interface 2, PAC-US445CN*. (This part is included with PAC-US445CN*) |
Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
