ESIE15-08B
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Part 2. Troubleshooting
5. Component checklist - Refrigerant Circuit
19/07/16
Page 101
Daikin Altherma Monobloc CA
5.9. Inverter PCB2
1.
Switch off the Daikin Altherma Monobloc CA via the user interface.
2.
Switch off the Daikin Altherma Monobloc CA with the field supplied circuit breaker.
3.
Remove the hydrobox top plate assembly, refer to
"Removing the hydrobox top plate assembly" on page 110
4.
Remove the hydrobox front plate, refer to
"Removing the hydrobox front plate" on page 111
5.
Remove the top plate, refer to
"Removing the top plate" on page 112
.
6.
Remove the front plate assembly, refer to
"Removing the front plate assembly" on page 113
7.
Open the compressor insulation, refer to
"Removing the compressor sound insulation" on page 114
.
8.
Remove the terminal cover.
9.
Measure the voltage on S70: pin 7 - 4 and wait until it drops below 10 VDC.
Technical specification
Description
The inverter PCB2 is a 400 V 3 phase inverter.
The inverter PCB2 drives the compressor motor
and powers the DC fan motor.
Location
Wiring diagram
PCB2
Unit
Check procedure
Electrical check
W
ARNING
: R
ISK
OF
F
IRE
•
When reconnecting a connector to the PCB, do not apply force or damage the connector or the connector pins on
the PCB.
W
ARNING
: R
ISK
OF
ELECTROCUTION
The smoothing capacitor must discharge below 10 VDC before removing the compressor wiring.
I
NFORMATION
Note the position of the cables on the compressor wire terminals to allow identical wiring during reinstallation.