Daikin F101~E101

Alarm Logic	F101 High pressure switch (HPS) is opened If HPS is opened before the compressor starts as soon as power turns on or if compressor has not been activated 5 times during start operation Fuse Fu1 is open E101 High pressure switch (HPS) is opened during operation
Possible Causes	HPS or HPS circuit failure Condenser air restriction / Short circuiting / CFM reverse rotation / Ambient temperature is greater than 50 degree C Solenoid valve leaks internally during pull down (BSV, HSV) Discharge line of compressor is restricted Fuse Fu1 is open Non-condensable gas Refrigerant overcharge Compressor failure / Controller failure

Trouble Shooting	1. Check air flow of evaporator 1) Excessive frosting 2) Reverse rotation of evaporator fan and check the current draw	1) Activate manual defrosting 2) Check air direction by opening ventilator and check current on fan motor secondary side of magnetic contactor
Trouble Shooting	2. Check mounting position of discharge gas temperature sensor (DCHS)	2. Repair as needed
Trouble Shooting	3. Check Low pressure transducer (LPT) 1) Connect manifold gauge, compare the value of pressure gauge and LPT (refer to page 3-1). LPT value is shown on display mode sensor (refer to page 2-12)	1) If the difference in pressure is more than 30kPa, replace LPT after checking wire connection
Trouble Shooting	4-1. Liquid solenoid valve (LSV) 1) Remove the CN14 on I/O board, check resistance value of the sensor 2) LCV ON/OFF check. Listen for clicking sound of LSV body	1) The resistance value is 15.2Ω+- 10% at 20 degree C 2) Replace LSV body if it does not make a sound
Trouble Shooting	4-2. Liquid line check 1) Suction modulating valve (SMV) / Expansion valve (EV) / Liquid solenoid valve (LSV) / Drier	1) Check for restrictions Replace as needed, and charge with specified amount of refrigerant
Trouble Shooting	5. Electronic expansion valve (EV) 1) Remove the CN11 on I/O board, check resistance value of coil 2) Touch EV body and check for chatter when opening (pulse) along with EV opening operation (refer to 2- 13 page) 3) Fully open the valve body using emergency magnet (refer to page 5-37) then operate the unit without mounting coil	1) The resistance value is 46Ω+-3Ω 2) Check coil or controller Coil should chatter with EV opening operation 3) If the alarm is still detected, the valve body is not working Replace EV body
Trouble Shooting	6. Low on refrigerant 1) If bubbles are present in site glass all the time and box temp is –5 degree C in frozen mode check for restriction and low on refrigerant. Recover refrigerant and charge with specified amount of refrigerant	~

Controller Action	F109 Unit stopped E109 Restart after 3 minutes. 9 restart attempts. Retry after 4 hours