- 315 -
[
IX
Troubleshooting ]
(3) Check method and remedy
1) Measures against noise
Check the followings when noise exists on the wave or the errors described in (1) occur.
2) Check the followings when the error "6607" occurs, or "HO" / "PLEASE WAIT"appears on the display on the remote
controller.
Error code definition
Remedy
Check
that the
wiring
work is
per-
formed
accord-
ing to wir-
ing
specifica-
tions.
1.The transmission line and the power
208 / 230 V line are not wired too
closely.
Isolate the transmission line from the power line (5cm [1-31/
32"] or more). Do not insert them in the same Do not insert
them in the same conduit.
2.The transmission line is not bundled
with that for another systems.
The transmission line must be isolated from another transmis-
sion line.
When they are bundled, erroneous operation may be caused.
3.The specified wire is used for the
transmission line.
Use the specified transmission line.
Type: Shielded wire CVVS/CPEVS/MVVS (For M-NET re-
mote controller)
Diameter: 1.25mm
2
[AGW16] or more
(Remote controller wire: 0.3 - 1.25mm
2
[AGW22-16])
4.When the transmission line is daisy-
chained on the indoor unit terminals,
are the shields daisy-chained on the
terminals, too?
The transmission is two-wire daisy-chained. The shielded
wire must be also daisy-chained.
When the shielded cable is not daisy-chained, the noise can-
not be reduced enough.
Check
that the
ground-
ing work
is per-
formed
accord-
ing to
ground-
ing speci-
fications.
5.Is the grounding of the shield of the
transmission line (for indoor unit con-
trol) provided on the indoor unit?
One point grounding must be provided on the outdoor unit.
If no grounding is provided, the noise on the transmission line
cannot escape leading to change of the transmission signal.
6.Check the treatment method of the
shield of the transmission line (for cen-
tralized control).
When group operation of indoor units connected to different
outdoor units is performed, provide grounding of the shield of
the transmission line for centralized control at the point of out-
door unit, and when the system controller is used, provide
grounding at the point of the system controller, so that the ef-
fect of noise can be minimized.
The environment against noise varies depending on the dis-
tance of the transmission lines, the number of the connected
units, the type of the controllers to be connected, or the envi-
ronment of the installation site. Therefore, the transmission
line work for centralized control must be performed as follows.
(1) When no grounding is provided
Group operation of indoor units connected to different
outdoor units: One point grounding on one outdoor unit
(power supply unit)
Use of MELANS: Grounding on the main controller
(power supply device)
(2) When an error occurs even though one point grounding
is provided: Ground the shield on all outdoor units.
Error code definition
Remedy
7. The farthest distance of transmission line is 200m
[656ft] or longer.
Check that the farthest distance from the outdoor unit to the
indoor unit and to the remote controller is within 200m [656ft].
8. The types of transmission lines are different.
Use the specified transmission line.
Type: Shielded wire CVVS/CPEVS/MVVS (For M-NET re-
mote controller)
Diameter: 1.25mm
2
[AWG16] or more
(Remote controller wire: 0.3-1.25mm
2
[AGW22-16])
9. Check the state of the choke coil on the transmis-
sion power supply circuit.
When resistance of the choke coil (L2) is between 0.5 and 2.6
ohm, the choke coil is normal.
When resistance (R3) on the outdoor unit MAIN board is
1kohm 5%, it is normal. Connectors CNS1 and CNS2 must
be removed when resistance is measured.
10.Indoor unit or remote controller failure
Replace the indoor unit controller board or the remote control-
ler.
Содержание PUHY-P168
Страница 11: ... 2 ...
Страница 23: ... 14 ...
Страница 25: ... 16 ...
Страница 38: ... 29 II Restrictions ...
Страница 42: ... 33 II Restrictions ...
Страница 46: ... 37 II Restrictions ...
Страница 50: ... 41 II Restrictions ...
Страница 54: ... 45 II Restrictions ...
Страница 58: ... 49 II Restrictions ...
Страница 75: ... 66 ...
Страница 99: ... 90 III Outdoor Unit BC Controller Components 2 RELAY BOARD RELAY 4 board 3 RELAY BOARD RELAY 10 board ...
Страница 101: ... 92 ...
Страница 111: ... 102 ...
Страница 113: ... 104 ...
Страница 126: ... 117 VI Refrigerant Circuit 1 Refrigerant Circuit Figure 119 2 Principal Parts and Functions 126 ...
Страница 127: ... 118 ...
Страница 134: ... 125 VI Refrigerant Circuit 3 CMB P104 and P108NU GB sub TH25 TH22 LEV3a CP Solenoid valves Block Check valves Block ...
Страница 145: ... 136 ...
Страница 147: ... 138 ...
Страница 185: ... 176 ...
Страница 187: ... 178 ...
Страница 241: ... 232 ...
Страница 243: ... 234 ...
Страница 366: ... 357 IX Troubleshooting ...
Страница 367: ... 358 ...
Страница 368: ... 359 X LED monitor display on the outdoor unit board 1 How to read the LED on the service monitor 361 ...
Страница 369: ... 360 ...