Daikin LX10F10A, Service Manual

Page: 47 / 126

2-22
2.6 Alarm Diagnosis
001 F101
・
E101
Alarm
Generating
Logic
F101 HPS activates within 30 seconds after compressor startup. （ HPS OFF ≧ 2400kPa, ON
≦ 1900kPa ）
E101 HPS activates during operation. （ HPS OFF ≧ 2400kPa 、 ON ≦ 1900kPa ）
Possible
Causes
＊ HPS or HPS circuit failure
＊ Blocking or short circuiting of air passage for air cooled condenser, CFM reverse rotation,
ambient temperature is over 50
℃ (allowable limit).
＊ DMV failure (Coil failure, Valve not opening, valve clogging)
＊ Clogging of compressor discharge line ---Check valve, strainer front of check valve)
＊ Mixing of noncondensable gas (water, air, etc.)
＊ Refrigerant overcharging
＊ Controller (CPU board) or inverter board failure
Trouble
Shooting
1. Check the HPS working value by watching HPT value
on the LCD screen (Lower left).
1. If HPS activates at lower than
HPT2400kPa, it is HPS fault.
2. Check if there is blocking or short circuiting of air
passage for air cooled condenser, CFM reverse
rotation or stop.
2. Repair if there is a problem.
3. DMV check
3.1 Disconnect the connector X11A (CPU board), then
check the resistance of DMV coil.
3.2 Touch for the coil vibration corresponding to opening
change (pls) in initial opening operation of DMV.
(Refer to initial opening operation in paragraph 1.4.5.)
3.3 Fully open the valve using emergency magnet. (Refer
to paragraph 4.9.4.)
Then operate the unit without mounting coil.
3.1 Resistance of each coil: 46 ± 3 Ω
3.2 In case that the coil does not
vibrate corresponding to opening
change, check the coil or the
controller.
3.3 If the alarm is still detected,
there is no valve body clogging
and it is normal.
5. Check for entering of noncondensable gas.
Check for entering of noncondensable gas referring to
paragraph 4.4.
If there is abnormality, recover
refrigerant and charge the specified
amount of refrigerant.
4. Check compressor discharge line
Check for clogging of check valve, strainer (front of
check valve)
6. Refrigerant overcharging
Controller
Action
F101 Unit stop
E101 Restart after 3 minutes standby × 9 times retry
Retry after 4 hours standby