Daikin 3MKS50DVM, Service Manual

Page: 223 / 403

Troubleshooting Si12-619A
210 Service Diagnosis
5.2 Outdoor Units
4
: ON,
1
: OFF,
5
: Blinks
Green : Flashes when in normal condition
Red : OFF in normal condition
- : Not used for troubleshooting
∗
: Varies depending on the cases.
Note: 1. The indications in the parenthesis ( ) in the remote controller display column are displayed
only when system-down occurs.
2. When a sensor error occurs, check the remote controller display to determine which sensor
is malfunctioning.
If the remote controller does not indicate the error type, conduct the following operation.
*Turn the power switch off and back on again. If the same LED indication appears again
immediately after the power is turned on, the fault is in the thermistor.
*If the above condition does not result, the fault is in the CT.
3. The indoor unit error indication may take the precedence in the remote controller display.
Outdoor Unit LED Indication Indication on
the remote
controller
Description of The Fault
Reference
Page
Green Red
A 1 2 3 4
5 3 3 3 3
00
Outdoor unit in normal condition
(Conduct a diagnosis of the indoor unit.)
—
UA
Unspecified voltage (between indoor and outdoor units)
259
UH
Anti-icing function in other rooms
259
5 3 3 4 4
(
U0
) Insufficient gas
253
5 4 3 3 4
U2
Low-voltage detection or over-voltage detection
257
5 3 4 4 4
U7
Signal transmission error (on outdoor unit PCB)
258
5 4 3 4 4
A5
Freeze-up protection control
222
5 4 4 4 3
E1
Outdoor unit PCB abnormality
224
5 4 3 4 3
(
E5
) OL activation (compressor overload)
225
5 3 4 4 3
(
E6
) Compressor lock
226
5 4 4 4 4
E7
DC fan lock
228
5 3 4 3 4
E8
Input over current detection
229
5 4 3 3 3
EA
Four way valve abnormality
231
5 4 3 4 3
F3
Discharge pipe temperature control
233
5 4 3 4 4
F6
High pressure control in cooling
234
5 4 4 3 3
H0
Compressor sensor system abnormality
236
H8
CT or related abnormality
239
5 4 4 3 3
H6
Position sensor abnormality
238
H9
Outdoor air thermistor or related abnormality
241
J3
Discharge pipe thermistor or related abnormality
241
J6
Heat exchanger thermistor or related abnormality
241
J8
Liquid pipe thermistor or related abnormality
241
J9
Gas pipe thermistor or related abnormality
241
P4
Radiation fin thermistor or related abnormality
241
5 4 4 3 4
L3
Electrical box temperature rise
243
5 3 3 3 4
L4
Radiation fin temperature rise
(Protection of driver overheating)
247
5 3 3 4 3
L5
Output over current detection
251