Daikin R407C PLUS, Service Manual

Page: 184 / 267

Si33-105 Troubleshooting
Troubleshooting R407C PLUS Series Heat Recovery System 173
3.17 Outdoor Unit: Malfunction of Moving Part of Electronic
Expansion Valve (Y1E)
Remote
Controller
Display
E9
Supposed
Causes
!
Defect of moving part of electronic expansion valve
!
Defect of outdoor unit PC board (A1P)
!
Defect of connecting cable
Troubleshooting
" 1 Coil check method for the moving part of the electronic expansion valve
Disconnect the electronic expansion valve from the PC board and check the continuity between
the connector pins.
(Normal)
"
: Continuity Approx. 300
Ω
#
: Continuity Approx. 150
Ω
×: No continuity
(VF043)
Electronic
expansion valve is
connected to X14A of outdoor
unit PC board
(A1P).
Normal
when coil check (
H
1)
of the moving part of the
electronic expansion
valve is checked.
The connecting cable
is short-circuited or
disconnected.
Replace the connecting cable.
Replace outdoor unit PC board A1P.
NO
NO
NO
Replace the moving part of the
electronic expansion valve.
After connecting, turn the power
off and then back on again.
YES
YES
YES
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Pin No. 1. White 2. Yellow 3. Orange 4. Blue 5. Red 6. Brown
1. White ×
"
×
#
×
2. Yellow ×
"
×
#
3. Orange ×
#
×
4. Blue ×
#
5. Red ×
6. Brown