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	<id>https://airconint.com/wiki/index.php?action=history&amp;feed=atom&amp;title=Blizzard_Series_Indoor_Unit_Troubleshooting</id>
	<title>Blizzard Series Indoor Unit Troubleshooting - Revision history</title>
	<link rel="self" type="application/atom+xml" href="https://airconint.com/wiki/index.php?action=history&amp;feed=atom&amp;title=Blizzard_Series_Indoor_Unit_Troubleshooting"/>
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	<updated>2026-05-09T06:11:49Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>https://airconint.com/wiki/index.php?title=Blizzard_Series_Indoor_Unit_Troubleshooting&amp;diff=2352&amp;oldid=prev</id>
		<title>ACINT: Created page with &quot;'''Note: ★ - Solid light, ○ - Flashing light, x - Light is off''' {| class=&quot;wikitable&quot; | rowspan=&quot;3&quot;| Error Code | colspan=&quot;4&quot;| Indoor PCB LED lights | rowspan=&quot;3&quot;| Error...&quot;</title>
		<link rel="alternate" type="text/html" href="https://airconint.com/wiki/index.php?title=Blizzard_Series_Indoor_Unit_Troubleshooting&amp;diff=2352&amp;oldid=prev"/>
		<updated>2020-11-23T14:52:57Z</updated>

		<summary type="html">&lt;p&gt;Created page with &amp;quot;&amp;#039;&amp;#039;&amp;#039;Note: ★ - Solid light, ○ - Flashing light, x - Light is off&amp;#039;&amp;#039;&amp;#039; {| class=&amp;quot;wikitable&amp;quot; | rowspan=&amp;quot;3&amp;quot;| Error Code | colspan=&amp;quot;4&amp;quot;| Indoor PCB LED lights | rowspan=&amp;quot;3&amp;quot;| Error...&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;'''Note: ★ - Solid light, ○ - Flashing light, x - Light is off'''&lt;br /&gt;
{| class=&amp;quot;wikitable&amp;quot;&lt;br /&gt;
| rowspan=&amp;quot;3&amp;quot;| Error Code&lt;br /&gt;
| colspan=&amp;quot;4&amp;quot;| Indoor PCB LED lights&lt;br /&gt;
| rowspan=&amp;quot;3&amp;quot;| Error Description&lt;br /&gt;
| rowspan=&amp;quot;3&amp;quot;| Troubleshooting&lt;br /&gt;
|-&lt;br /&gt;
| Running&lt;br /&gt;
| Timer&lt;br /&gt;
| Sleep&lt;br /&gt;
| Power&lt;br /&gt;
|-&lt;br /&gt;
| 1&lt;br /&gt;
| 2&lt;br /&gt;
| 3&lt;br /&gt;
| 4&lt;br /&gt;
|-&lt;br /&gt;
| EA&lt;br /&gt;
| &lt;br /&gt;
|&lt;br /&gt;
|&lt;br /&gt;
|&lt;br /&gt;
| Display Board and Control Board Communication Error&lt;br /&gt;
| &lt;br /&gt;
* The connection between the display board and control board might be loose.&lt;br /&gt;
* The indoor control board might have failed.&lt;br /&gt;
* The wiring of the display board might be incorrect.&lt;br /&gt;
|-&lt;br /&gt;
| 0&lt;br /&gt;
|&lt;br /&gt;
|&lt;br /&gt;
|&lt;br /&gt;
|&lt;br /&gt;
| Normal Operations&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
| 1&lt;br /&gt;
| x&lt;br /&gt;
| ○&lt;br /&gt;
| x&lt;br /&gt;
| x&lt;br /&gt;
| Outdoor Coil Temperature Sensor Failure &lt;br /&gt;
| &lt;br /&gt;
* The outdoor coil temperature sensor might be loose. &lt;br /&gt;
* The outdoor coil temperature sensor might have failed.&lt;br /&gt;
* The indoor control board might have failed.&lt;br /&gt;
|-&lt;br /&gt;
| 2&lt;br /&gt;
| x&lt;br /&gt;
| ○&lt;br /&gt;
| ★&lt;br /&gt;
| x&lt;br /&gt;
| Compressor Exhaust Temperature Sensor Failure&lt;br /&gt;
|&lt;br /&gt;
* The compressor exhaust temperature sensor might be loose. &lt;br /&gt;
* The compressor exhaust temperature sensor might have failed.&lt;br /&gt;
* The outdoor control board might have failed.&lt;br /&gt;
|-&lt;br /&gt;
| 5&lt;br /&gt;
| ★&lt;br /&gt;
| ○&lt;br /&gt;
| x&lt;br /&gt;
| x&lt;br /&gt;
| IPM Module Protection&lt;br /&gt;
| &lt;br /&gt;
* The IPM board might have failed.&lt;br /&gt;
* The outdoor fan might be broken.&lt;br /&gt;
* The outdoor fan motor might have failed.&lt;br /&gt;
* The outdoor fan is being obstructed.&lt;br /&gt;
* The condenser might be dirty.&lt;br /&gt;
* The outdoor unit might not have been installed correctly.&lt;br /&gt;
|-&lt;br /&gt;
| 6&lt;br /&gt;
| ★&lt;br /&gt;
| ○&lt;br /&gt;
| x&lt;br /&gt;
| ★&lt;br /&gt;
| AC Voltage Higher or Lower Protection&lt;br /&gt;
| &lt;br /&gt;
* The supply voltage is higher or lower than normal.&lt;br /&gt;
* The inner supply voltage of the unit is higher or lower than normal.&lt;br /&gt;
|-&lt;br /&gt;
| 7&lt;br /&gt;
| ★&lt;br /&gt;
| ○&lt;br /&gt;
| ★&lt;br /&gt;
| x&lt;br /&gt;
| Communication Failure Between Indoor and Outdoor Units&lt;br /&gt;
| &lt;br /&gt;
* The communication cable connection might be loose.&lt;br /&gt;
* The communication cable might have failed.&lt;br /&gt;
* The connection between the filter board and the outdoor control board might be incorrect or loose.&lt;br /&gt;
* The connection between the filter board and the terminal might be incorrect or loose.&lt;br /&gt;
* The indoor unit control board might have failed.&lt;br /&gt;
* The PFC board might have failed.&lt;br /&gt;
* The power board might have failed.&lt;br /&gt;
* The outdoor unit control board might have failed.&lt;br /&gt;
|-&lt;br /&gt;
| 8&lt;br /&gt;
| ★&lt;br /&gt;
| ○&lt;br /&gt;
| ★&lt;br /&gt;
| ★&lt;br /&gt;
| Current Overload Protection&lt;br /&gt;
| &lt;br /&gt;
* The fan motor might have run abnormally.&lt;br /&gt;
* The condenser and/or evaporator might be dirty.&lt;br /&gt;
* The air inlet and outlet might be abnormal.&lt;br /&gt;
|- &lt;br /&gt;
| 9&lt;br /&gt;
| x&lt;br /&gt;
| x&lt;br /&gt;
| ○&lt;br /&gt;
| x&lt;br /&gt;
| Maximum Current Protection &lt;br /&gt;
| &lt;br /&gt;
* The outdoor control board might have short-circuited.&lt;br /&gt;
* The drive board might have short-circuited.&lt;br /&gt;
* Other electrical components might have short-circuited.&lt;br /&gt;
|-&lt;br /&gt;
| 10&lt;br /&gt;
| x&lt;br /&gt;
| x&lt;br /&gt;
| ○&lt;br /&gt;
| ★&lt;br /&gt;
| Communication Error Between Outdoor Unit Control Board and Driver Board&lt;br /&gt;
| &lt;br /&gt;
* The connection between control board and driver board might be loose.&lt;br /&gt;
* Either the control or driver board might have failed.&lt;br /&gt;
|-&lt;br /&gt;
| 11&lt;br /&gt;
| x&lt;br /&gt;
| ★&lt;br /&gt;
| ○&lt;br /&gt;
| x&lt;br /&gt;
| Check Outdoor EEPROM&lt;br /&gt;
| &lt;br /&gt;
* The EEPROM chip might be loose.&lt;br /&gt;
* The EEPROM chip might be inserted improperly.&lt;br /&gt;
* The EEPROM chip might have failed.&lt;br /&gt;
|-&lt;br /&gt;
| 12&lt;br /&gt;
| x&lt;br /&gt;
| ★&lt;br /&gt;
| ○&lt;br /&gt;
| ★&lt;br /&gt;
| Outdoor Ambient Temperature Too Low Protection&lt;br /&gt;
| &lt;br /&gt;
* Outdoor ambient temperature too low for operation.&lt;br /&gt;
|-&lt;br /&gt;
| 13&lt;br /&gt;
| ★&lt;br /&gt;
| x&lt;br /&gt;
| ○&lt;br /&gt;
| x&lt;br /&gt;
| Compressor Exhaust Temperature Too High Protection&lt;br /&gt;
| &lt;br /&gt;
* The compressor exhaust temperature sensor might have failed.&lt;br /&gt;
* The unit has insufficient refrigerant.&lt;br /&gt;
|-&lt;br /&gt;
| 14&lt;br /&gt;
| ★&lt;br /&gt;
| x &lt;br /&gt;
| ○&lt;br /&gt;
| ★&lt;br /&gt;
| Check Outdoor Ambient Temperature Sensor&lt;br /&gt;
| &lt;br /&gt;
* The outdoor ambient temperature sensor's connection might be loose.&lt;br /&gt;
* The outdoor ambient temperature sensor might have failed.&lt;br /&gt;
* The outdoor control board might have failed.&lt;br /&gt;
|-&lt;br /&gt;
| 15&lt;br /&gt;
| ★&lt;br /&gt;
| ★&lt;br /&gt;
| ○&lt;br /&gt;
| x&lt;br /&gt;
| Compressor Shell Temperature Too High Protection&lt;br /&gt;
| &lt;br /&gt;
* The compressor exhaust temperature sensor might be loose.&lt;br /&gt;
* The unit has insufficient refrigerant.&lt;br /&gt;
|-&lt;br /&gt;
| 16&lt;br /&gt;
| &lt;br /&gt;
|&lt;br /&gt;
|&lt;br /&gt;
|&lt;br /&gt;
| Anti-Freeze Protection (Cooling) or Overload Protection (Heating) in Indoor Unit&lt;br /&gt;
| &lt;br /&gt;
* The indoor coil temperature sensor might be loose.&lt;br /&gt;
* The indoor coil temperature sensor might have failed.&lt;br /&gt;
* The indoor control board might have failed.&lt;br /&gt;
* The refrigerant system is abnormal.&lt;br /&gt;
|-&lt;br /&gt;
| 17&lt;br /&gt;
| &lt;br /&gt;
|&lt;br /&gt;
|&lt;br /&gt;
| &lt;br /&gt;
| PFC Protection&lt;br /&gt;
|&lt;br /&gt;
* The PFC might have failed.&lt;br /&gt;
* The outdoor drive board might have failed.&lt;br /&gt;
|-&lt;br /&gt;
| 18&lt;br /&gt;
| &lt;br /&gt;
|&lt;br /&gt;
|&lt;br /&gt;
| &lt;br /&gt;
| DC Compressor Start Failure&lt;br /&gt;
| &lt;br /&gt;
* The outdoor drive board might have failed.&lt;br /&gt;
* The compressor might have failed.&lt;br /&gt;
|-&lt;br /&gt;
| 19&lt;br /&gt;
| x&lt;br /&gt;
| x&lt;br /&gt;
| x&lt;br /&gt;
| ○&lt;br /&gt;
| Check Compressor Drive&lt;br /&gt;
|&lt;br /&gt;
* The outdoor drive board might have failed.&lt;br /&gt;
* The compressor might have failed.&lt;br /&gt;
* The outdoor control board might have failed.&lt;br /&gt;
|-&lt;br /&gt;
| 20&lt;br /&gt;
| ★&lt;br /&gt;
| x&lt;br /&gt;
| x&lt;br /&gt;
| ○&lt;br /&gt;
| Outdoor Fan Motor Locked Rotor Protection&lt;br /&gt;
|&lt;br /&gt;
* The connection of the outdoor fan motor might be loose.&lt;br /&gt;
* There might be something obstructing the outdoor fan motor.&lt;br /&gt;
* The fan motor might have failed.&lt;br /&gt;
* The outdoor control board might have failed.&lt;br /&gt;
|-&lt;br /&gt;
| 21&lt;br /&gt;
| &lt;br /&gt;
|&lt;br /&gt;
|&lt;br /&gt;
| &lt;br /&gt;
| Outdoor Coil Anti-Overload Protection With Cooling&lt;br /&gt;
| &lt;br /&gt;
* There might be too much refrigerant.&lt;br /&gt;
* The outdoor fan motor might have failed.&lt;br /&gt;
* The outdoor fan might be broken.&lt;br /&gt;
* The condensor might be dirty.&lt;br /&gt;
* The air inlet and outlet of the indoor and outdoor unit is abnormal.&lt;br /&gt;
|-&lt;br /&gt;
| 22&lt;br /&gt;
|&lt;br /&gt;
|&lt;br /&gt;
|&lt;br /&gt;
|&lt;br /&gt;
| Compressor Pre-Heating Process&lt;br /&gt;
| &lt;br /&gt;
* This is a normal operation mode in cold weather.&lt;br /&gt;
|-&lt;br /&gt;
| 24&lt;br /&gt;
| &lt;br /&gt;
|&lt;br /&gt;
|&lt;br /&gt;
|&lt;br /&gt;
| Check Outdoor Board Chip&lt;br /&gt;
| &lt;br /&gt;
* The drive board might not be compatible with this unit.&lt;br /&gt;
* The compressor might not be compatible with this unit.&lt;br /&gt;
|-&lt;br /&gt;
| 25&lt;br /&gt;
|&lt;br /&gt;
|&lt;br /&gt;
|&lt;br /&gt;
|&lt;br /&gt;
|Low Frequency Protection&lt;br /&gt;
|&lt;br /&gt;
* When frequency of system is too low, the unit will start self protection, and when working condition comes back, the unit will work again. Usually, after about 3 to 5 mins, the unit will recover or you can power off unit at first, then restart the unit.&lt;br /&gt;
|-&lt;br /&gt;
| 26&lt;br /&gt;
|&lt;br /&gt;
|&lt;br /&gt;
|&lt;br /&gt;
|&lt;br /&gt;
| Protection Against Overheated Outdoor Radiator&lt;br /&gt;
| &lt;br /&gt;
* Radiator sensors might have failed.&lt;br /&gt;
* Detection circuit of the sensor on the control panel might have failed.&lt;br /&gt;
|-&lt;br /&gt;
| 27&lt;br /&gt;
|&lt;br /&gt;
|&lt;br /&gt;
|&lt;br /&gt;
|&lt;br /&gt;
| High Pressure System Protection&lt;br /&gt;
| &lt;br /&gt;
* The pressure switch might have failed.&lt;br /&gt;
* The pressure detection system on the control panel might have failed.&lt;br /&gt;
* The measured value of the system pressure might have exceeded the limit.&lt;br /&gt;
|-&lt;br /&gt;
| 33&lt;br /&gt;
| ○&lt;br /&gt;
| x&lt;br /&gt;
| x&lt;br /&gt;
| ★&lt;br /&gt;
| Check Indoor Ambient Temperature Sensor&lt;br /&gt;
| &lt;br /&gt;
* The indoor ambient temperature sensor might be loose.&lt;br /&gt;
* The indoor ambient temperature sensor might have failed.&lt;br /&gt;
* The indoor ambient control board might have failed.&lt;br /&gt;
|-&lt;br /&gt;
| 34 &lt;br /&gt;
| ○&lt;br /&gt;
| x&lt;br /&gt;
| ★&lt;br /&gt;
| x&lt;br /&gt;
| Check indoor Coil Temperature Sensor &lt;br /&gt;
|&lt;br /&gt;
* The indoor coil temperature sensor might be loose.&lt;br /&gt;
* The indoor coil temperature sensor might have failed.&lt;br /&gt;
* The indoor control board might have failed.&lt;br /&gt;
|-&lt;br /&gt;
| 36&lt;br /&gt;
| ○&lt;br /&gt;
| ★&lt;br /&gt;
| x&lt;br /&gt;
| ★&lt;br /&gt;
| Communication Failure Between Indoor and Outdoor Unit&lt;br /&gt;
|&lt;br /&gt;
* The communication cable connection might be loose.&lt;br /&gt;
* The communication cable might have failed.&lt;br /&gt;
* The connection between the filter board and the outdoor control board might be incorrect or loose.&lt;br /&gt;
* The connection between the filter board and the terminal might be incorrect or loose.&lt;br /&gt;
* The indoor unit control board might have failed.&lt;br /&gt;
* The PFC board might have failed.&lt;br /&gt;
* The power board might have failed.&lt;br /&gt;
* The outdoor unit control board might have failed.&lt;br /&gt;
|-&lt;br /&gt;
| 38&lt;br /&gt;
| ○&lt;br /&gt;
| ★&lt;br /&gt;
| ★&lt;br /&gt;
| ★&lt;br /&gt;
| Check Indoor EEPROM Failure&lt;br /&gt;
|&lt;br /&gt;
* The EEPROM chip might be loose.&lt;br /&gt;
* The indoor control board might have failed.&lt;br /&gt;
|-&lt;br /&gt;
| 39&lt;br /&gt;
| ○&lt;br /&gt;
| x&lt;br /&gt;
| ★&lt;br /&gt;
| ★&lt;br /&gt;
| Check Indoor Fan Motor&lt;br /&gt;
|&lt;br /&gt;
* The indoor fan motor might be obstructed.&lt;br /&gt;
* The indoor fan motor cord might be loose.&lt;br /&gt;
* The indoor fan motor might have failed.&lt;br /&gt;
* The indoor control board might have failed.&lt;br /&gt;
|-&lt;br /&gt;
| 41&lt;br /&gt;
| ★&lt;br /&gt;
| ★&lt;br /&gt;
| ○&lt;br /&gt;
| ★&lt;br /&gt;
|  Indoor Board Grounding Failure&lt;br /&gt;
| &lt;br /&gt;
* Indoor control board has failed.&lt;br /&gt;
|-&lt;br /&gt;
|}&lt;br /&gt;
Return to [[Blizzard Series]] main page.&lt;/div&gt;</summary>
		<author><name>ACINT</name></author>
	</entry>
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