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IPM Protection:
H5, Indoor unit. (Delayed)
Indoor Heating LED, flash 5 times (Delayed)
Yellow LED, Outdoor unit flashing 4 times.
# Disconnect the supply power to the unit by means of the isolation switch.
# Remove the Blue-U, Yellow-V & Red-W spade terminals from the main outdoor PCB to the
compressor, then measure the resistance value of each winding from these three spade terminal points.
Note: The resistance value should be the same across any terminal combination.
Note: The resistance values will change in accordance to Capacity & Ambient temperatures.
# If there is an open circuit or infinite resistance reading from these points, then measure the
resistance value from the spade terminals on the compressor.
# If all resistance checks are okay, continue to the next page.
Resistance check from the Blue-U, Yellow-V & Red-W
spade terminals on main outdoor PCB.
Blue-Run, Yellow-Start & Red-Common terminal
points of compressor.
Page 19 KSSSI113
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