Table Of Contents - Mitsubishi Electric PUHZ-W50VHA Technical Manual

4 Inter face (I/F)
1. System outline .................................................................................. 24
2. System structure ............................................................................... 24
3. Power supply .................................................................................... 28
4. Connecting thermistor....................................................................... 30
5. Interface controller switch setting ..................................................... 31
6. Input specifi cations ........................................................................... 32
7. Output specifi cations ........................................................................ 33
8. LED display detail ............................................................................. 34
9. Maintenance information .................................................................. 35
10. Central control .................................................................................. 52
11. Outlines and dimensions .................................................................. 53
12. Troubleshooting ................................................................................ 54
Notes on system controller side in I/F connection system
(1) Please do not transmit "STEP 0" during defrost operation.
Defrost operation might be interrupted, and frost remain.
(Please demand the planned capacity step even when the system controller receives defrost signal from the heat
pump (outdoor unit)).
(2) Please do not transmit "STEP 0" when the outdoor unit(H/P) is abnormal.
Abnormal detection data is reset, and an Abnormal point cannot be confi rmed.
CONTENTS
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