Mark HCNI 533, Техническое руководство

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8.5.4 E3 / EH 03 / F5 / EC 07 (Fan speed is operating outside of the normal range diagnosis and
solution)
Description: When the indoor / outdoor fan speed keeps too low or too high for a certain time, the LED
displays the failure code and the AC turns off.
Recommended parts to check or to prepare:
• Connection wires
• Fan assembly
• Fan motor
• PCBs
Troubleshooting and repair:
Note:
For certain models, outdoor PCB could not be removed separately. In this case, the outdoor
electric control box should be replaced as a whole.
“Wall” Type Active Line R32 Refrigerant AC: 6. Troubleshooting
[6]-21
Troubleshooting and repair:
YES
Does a problem remain?
NO
YES
NO
YES
NO
YES
NO
6.7.4 E3 / EH 03 / F5 / EC 07 (Fan speed is operating outside of the normal range diagnosis and solution)
Description
: When the indoor / outdoor fan speed keeps too low or too high for a certain time, the LED displays the
failure code and the AC turns off.
Recommended parts to check or to prepare:
• Connection wires
• Fan assembly
• Fan motor
• PCBs
Power off then restart the unit after 2 minutes.
The unit is operating normally.
Shut off the power supply.
Rotate the fan by hand.
Does it turn easily? Find the cause of the problem and resolve it .
Check the wiring of fan motor.
Is it improperly wired?
Ensure proper connections.
Measure the voltage for the fan
motor from the PCB
.
Is it within normal parameters?
Replace the fan motor.
Replace the indoor / outdoor PCB .
Note:
For certain models, outdoor PCB could not be removed separately. In this case, the outdoor electric control
box should be replaced as a whole.