Service Manual
Table Of Contents
- Cover
- Table of contents
- Part 1 List of Functions
- Part 2 Specifications
- Part 3 Printed Circuit Board Connector Wiring Diagram
- Part 4 Refrigerant Circuit
- Part 5 Functions and Control
- Part 6 Test Operation and Field Settings
- Part 7 Remote Controller
- Part 8 Troubleshooting
- 1. Troubleshooting with LED
- 2. Service Diagnosis
- 3. Error Codes and Description
- 4. Troubleshooting for CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series
- 5. Troubleshooting for FFQ Series
- 6. Troubleshooting for Branch Provider (BP) Unit
- 7. Troubleshooting for Outdoor Unit
- 8. Thermistor Resistance/Temperature Characteristics
- 9. Pressure Sensor
- 10. Method of Replacing Inverter’s Power Transistors Modules
- Part 9 Appendix
SiUS181631EA Branch Provider (BP) Unit
Printed Circuit Board Connector Wiring Diagram 25
2. Branch Provider (BP) Unit
2.1 BPMKS048A2U, BPMKS049A3U
PCB ASSY
1) X20A Connector for bypass electronic expansion valve
2) X21A - X23A Connector for electronic expansion valve for room A, B, C
(X23A for room C: BPMKS049A3U only)
3) X90A Connector for thermistors
4) F2U Fuse (3.15 A / 250 V)
5) X3M Terminal for inter-connecting wire to room A
6) X4M Terminal for inter-connecting wire to room B
7) X5M Terminal for inter-connecting wire to room C (BPMKS049A3U only)
8) F1, F2 (on X6M) Terminal for transmission to outdoor unit or other BP units
9) L1, L2 (on X1M) Terminal for power supply (60 Hz, 208 ~ 230 V)
10)E1 Terminal for ground wire
11)H1P (LED A) LED for service monitor (green)
12)H2P - H5P LED for error indication (red)
(LED 1 - 4)
13)DS2 DIP switch
X3M
X4M
X5M
F2U
E1
X22A
X21A
X20A
F2
X6M
X1M
F1
L2
L1
X90ADS2
X23A
H1P (LED A)
H2P (LED 1)
H3P (LED 2)
H4P (LED 3)
H5P (LED 4)
N2L2N1L1
3P326842-1
3P326842-2