Daikin LX10F11B Service Manual page 58

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015 E304
Alarm
Incorrect configuration set (Reheat coil)
Logic
Possible
Dehumidification operation is selected when reheat coil is set to "OFF" in Configuration Set.
Causes
Trouble Change the Reheat Coil setting from "OFF" to "ON" on the configuration setting
Shooting (＊12 Configuration Set in paragraph 2.3).
Controller
E304 Alarm display only (Alarm LED is blinking.)
Action
016 E401
（SS） ・
Alarm Above sensor≦-40℃ (54kΩ) with 3 minute elapse or ≧100℃ (0.22 kΩ) with 3 minute elapse
Logic Note: The alarm is activated when sensor or the circuit is disconnected (open) or short-circuited.
Possible ＊Open contact of connector X16A（CPU board）
Causes ＊Temperature sensor failure
＊Controller （CPU board） failure
Trouble Step 1. Check connector X16A and make sure it is properly installed.
Shooting
Step 2. Disconnect X16A, and check the resistance of
sensor
X16A
9
11
If the resistance value matches the temperature
sensor characteristic table (refer to 5.2
temperature sensor characteristics), the sensor
is normal.
Step 3. Check the controller (CPU board).
Controller <Chilled mode>
Action When E401 (SS failure), Backup by DSS
When E401 (SS failure) and E402 (DSS failure), Backup by RS=SP+2℃
When E401 (SS failure), E402 (DSS failure) and E403 (RS failure), Backup by DRS=SP+2℃
<Frozen mode>
When E403 (RS failure), Backup by DRS
When E403 (RS failure) and E404 (DRS failure), Backup by SS=SP-5℃
When E403 (RS failure), E404 (DRS failure) and E401 (SS failure), Backup by DSS=SP-5℃
When All sensors are failure (RS, DRS, SS, DSS), the unit will operate as Full cool continuously
E402
（DSS）
1
2
8
7
10
12
・ E403 ・ E404
（RS）
Example of sensor resistance value
measurement (Connector X16A)
* Contact to the connector pins
DRS
correctly.
RS
DSS
SS
2-30
（DRS）