Daikin Enfinity CCW Installation And Maintenance Manual page 39

I/O Expansion Module LED Faults (For units with optional boilerless electric heat) (continued)
Table 26: High Pressure Circuit #2
Description
High Pressure Circuit #2
• Verify high pressure switch is connected to terminal H6 on the I/O Expansion board
• Check for continuity of the high pressure switch
If the high pressure fault resets when power is recycled:
• Check water flow (cooling operation)
• Check airflow (heating operation)
• Entering water and air temperatures should be within the operating limits
Table 27: Low Pressure Circuit #2
Description
Low Pressure Circuit #2
• Loose wire connection on low pressure circuit
• Failed low pressure switch
• Unit is low on charge
Table 28: Low Suction Temp #2
Description
Low Suction Temp #2
• Check water flow (heating operation)
• Check airflow (cooling operation)
• Entering water and air temperatures should be within the operating limits
Table 29: Compressor Suction Temp Sensor Fail circuit #2
Description
Compressor Suction Temp Sensor
Fail circuit #2
• Check connection of low suction temperature sensor
• Check resistance of low suction temperature sensor, leaving water temperature sensor, and room sensor or return air sensor. All sensors are
10kohm thermistor @77°F
www.DaikinApplied.com
Type Yellow
Fault OFF
Type Yellow
Fault OFF
Type Yellow
Fault Flash
Type Yellow
Fault Flash
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t
roubleshooting
Green Red
OFF Flash
Green Red
OFF ON
Green Red
OFF OFF
Green Red
Flash ON
IM 1049-9