Inspecting The Outdoor Fan Motor - Daikin GYEQ20AN Service Manual

SiAUY361411EA

1.26 Inspecting the Outdoor Fan Motor

Caution When you inspect the outdoor fan motor with the outdoor unit powered ON, take extreme care
not to directly touch the circuit board (except the switches) or you may get an electrical shock.
Even with the power OFF, there is a risk of an electric shock when any circuit board has an LED
still lit. Before accessing any circuit board, make sure that there is no circuit board whose
LED(s) are still lit.
Parts to inspect
Power supply
circuit board
DCBL circuit
board
∗ Reference value
1. Using a tester, check if the output voltage requirements specified above are met.
2. If the voltage is significantly different than specified above, stop the system using the
3. If the harness and connectors are OK, then check each component.
Inspect the fan motor by measuring the resistance between its terminals.
∗ At 20°C (reference value)
Parts Inspection
Output voltage
Measuring points
Between CN104-1 and -3
Between CN201-1 and -3
CN203
CN204
CN205
Between phases
onboard checker and wait for 5 minutes; then, with the power shut OFF, check the harness
for continuity and the junction connectors for contact failure using a tester.
Inspecting the fan motor
Measuring points
Between terminals #1(red) and #2 (white)
Power
Between terminals #1(red) and #3 (black)
supply
Between terminals #2(white) and #3 (black)
Measuring points
Between #1 (pink) and #2 (gray)
Between #1 (pink) and #3 (yellow)
Between #1 (pink) and #4 (blue)
Between #1 (pink) and #5 (amber)
Between #2 (gray) and #3 (yellow)
Signal
Between #2 (gray) and #4 (blue)
Between #2 (gray) and #5 (amber)
Between #3 (yellow) and #4 (blue)
Between #3 (yellow) and #5 (amber)
Between #4 (blue) and #5 (amber)
Inspecting the Outdoor Unit
During system stop With actuator check ON
280 V DC ∗
280 V DC ∗
Speed (min
700
0 V ∗
600
500
Measured value (Ω) ∗
Measured value (kΩ) ∗
280 V DC ∗
280 V DC ∗
-1
) Voltage
180±5 V AC ∗
180±5 V AC ∗
180±5 V AC ∗
7.3±10%
7.3±10%
7.3±10%
100±10%
10±10%
10±10%
10±10%
100±10%
100±10%
100±10%
20±10%
20±10%
20±10%
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