Daikin Altherma 3 M - Page 138

3 | Components
Service manual
138
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
ESIE20-06A – 2021.03
VW
U
c Wire terminal U
V Wire terminal V
W Wire terminal W
7 Install the compressor insulation.
8 Turn ON the power using the respective circuit breaker.
9 Start the unit operation via the user interface.
10 Wait for – or create condition to operate the compressor.
11 Once the compressor operates, measure the U-V-W inverter voltages. All
measurements MUST be the same.
Inverter voltage measurements are
correct?
Action
Yes Continue with the next step.
No Perform a check of the appropriate PCB,
see "3Components"[486].
12 Measure the current in each phase U, V and W while compressor is operating.
All measurements MUST be the same.
Compressor motor winding current
measurements are correct?
Action
Yes Perform an insulation check of the
compressor, see "3.7.1Checking
procedures"[4134].
No Preventively replace the compressor,
see "3.7.2Repair procedures"[4140].
To perform an insulation check of the compressor
Prerequisite: First perform an electrical check of the compressor, see
"3.7.1Checking procedures"[4134].
Prerequisite: Stop the unit operation via the user interface.
1 Turn OFF the respective circuit breaker.
DANGER: RISK OF ELECTROCUTION
Confirm the rectifier voltage is below 10 V DC before proceeding, see "To prevent
electrical hazards"[4285].
2 Remove the cover of the compressor wire terminals.