Alarm Diagnosis - Daikin LX10F11B3 Service Manual

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2.6 Alarm Diagnosis

001 F101 ・ E101
Alarm F101 HPS activates within 30 seconds after compressor start. （OFF≧2400kPa,
Generating ON≦1900kPa ）
Logic E101 HPS activates during operation. （OFF≧2400kPa、ON≦1900kPa ）
Possible ＊HPS or HPS circuit including connector X6 (inverter board) failure
Causes ＊ Condenser air restriction / Short circuiting / CFM reverse rotation / Ambient temperature is
over 50 degree C
＊DMV failure (Coil failure, Valve not opening, valve clogging)
＊Discharge line of compressor is restricted ---Check valve, strainer (after HPT)
＊Mixing of non-condensable gas (water, air, etc.)
＊Refrigerant overcharging
＊Controller (CPU board) or inverter board failure
Trouble Stpe 1. Check value of HPS activating while watching to
Shooting HPT value on the LCD screen.
Stpe 2. Check for blocking or short circuiting of air
passage on air cooled condenser, CFM reverse
rotation or stopped.
Stpe 3. DMV check
3.1 Disconnect the connector X11A (CPU board),
then check resistance of DMV coil.
3.2 Touch on coil vibration corresponding to opening
change when calibrating DMV at startup. (Refer to
Calibration valves in paragraph 1.4.6.)
3.3 Fully open valve using emergency magnet. (Refer
to paragraph 4.9.4.)
Then operate the unit without coil.
Step 4. Check compressor discharge line
Check for clogging of check valve, strainer
(front of check valve)
Stpe 5. Check for non condensable gas
Refer to paragraph 4.4
Stpe 6. Refrigerant overcharging
Controller F101 Unit stop
Action
E101 Restart after 3 minutes
If HPS activates at lower than
HPT2400kPa, replace HPS.
Repair as needed.
3.1 Resistance of each coil: 46±3Ω
3.2 In case that the coil does not
vibrate corresponding to opening
change, check the coil or the
controller.
3.3 If alarm is repeated, the valve
body will not operate. Replace
DMV body
If there is abnormality, recover
refrigerant and charge the specified
amount of refrigerant.
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