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DIAGNOSIS AND SOLUTION (CONT)
Indoor / outdoor unit’s communication diagnosis and solution (E1)
Error Code
E1
Malfunction Decision Conditions
Indoor unit does not receive the feedback from outdoor unit during 110 seconds and this condition
happens four times continuously.
Supposed Causes
S
Wiring mistake
S
Indoor or outdoor PCB faulty
Troubleshooting
Measure Vs., is it a positive fluctuation?
(Vs represents the voltage S and N of the
outdoor unit. Red pan-S, Black pan-N)
Power off, then restart the unit 2 minutes later
Replace the indoor main PCB.
Power on. Is the error resolved?
No
Check the indoor wiring connection
Yes
Check whether the
reactor is normal
Yes
No
Check the outdoor wiring connection
Replace the reactor
Yes
Replace the outdoor main PCB.
Power on. Is the error resolved?
Replace the indoor main PCB
No
Replace the outdoor main PCB.
Yes
No
Yes
Yes
Summary of Contents for 38MHRB series
Page 7: ...7 DIMENSIONS OUTDOOR CONT Unit inch mm Fig 3 Size 24K...
Page 11: ...11 WIRING DIAGRAMS COOLING ONLY Fig 7 Wiring Diagram Size Cooling Only Size 12K 115V...
Page 12: ...12 WIRING DIAGRAMS COOLING ONLY CONTINUED Fig 8 Wiring Diagram Cooling Only Size 12K 230V...
Page 13: ...13 WIRING DIAGRAMS COOLING ONLY CONTINUED Fig 9 Wiring Diagram Cooling Only Sizes 18 24K...
Page 14: ...14 WIRING DIAGRAMS HEAT PUMP Fig 10 Wiring Diagram Heat Pump Size 12K 115V...
Page 15: ...15 WIRING DIAGRAMS HEAT PUMP CONTINUED Fig 11 Wiring Diagram Heat Pump Sizes 09 12 18 230V...
Page 16: ...16 WIRING DIAGRAMS HEAT PUMP CONTINUED Fig 12 Wiring Diagram Heat Pump Size 24 230V...
Page 37: ...37 DIAGNOSIS AND SOLUTION CONT Fig 36 P U Fig 37 P V...
Page 38: ...38 DIAGNOSIS AND SOLUTION CONT Fig 38 P W Fig 39 N U...
Page 39: ...39 DIAGNOSIS AND SOLUTION CONT Fig 40 N V Fig 41 N W...
