Always showing alarm EOC,EOP

Lint will jam the start/run switch on the motor. Vacuum out the motor real good and check that the switch moves freely, and all the wires to it are plugged in good.

E.OC is an over current error.

The inverter is sensing a short on the U/V/W terminals. This could be a shorted motor, motor leads and an internal short in the inverter.

Disconnect the motor leads from the inverter, and run the inverter as you normally would.

If the E.OC error does not occur the short is external of the inverter.
If the E.OC occurs, then the short is internal to the inverter.

DTC P0521: Engine Oil Pressure (EOP) Sensor Performance

The engine oil pressure (EOP) sensor changes voltage based on the engine oil pressure. The EOP sensor is a 3-wire sensor comprising of the signal circuit, the low reference circuit and the 5-volt reference circuit. The engine control module (ECM) supplies 5 volts to the EOP sensor via the 5-volt reference circuit and provides ground via the EOP low reference circuit. The ECM monitors the signal circuit of the EOP sensor to determine the EOP sensor voltage is within the normal operating range of approximately 1-4 volts. When the engine oil pressure is high, the EOP sensor voltage is high and the ECM senses a high signal voltage. When the engine oil pressure is low, the EOP sensor voltage is low and the ECM senses a low signal voltage. The ECM sends the EOP information to the instrument panel cluster (IPC) via GMLAN serial data message.

Conditions for Setting the DTC
P0521
The ECM detects that the difference between the predicted oil pressure and the actual oil pressure is either less than 47 kPa (6.8 psi) or greater than 50 kPa (7.3 psi).

Your best bet ,take it to a qualified repair shop that has the proper diagnostic testing equipment to diagnose this.

I got dkcity treadmill model number- DK5320HRP ' When we press start button the motor does not turn and after few second an error E7 showing on the display. plaese if anyone can solve this proble

Alarm settings can be made with clock/radio on or off.
The Alarm Clock/Radio is equipped with two independent alarm
systems each of which can activate the Human Wake System Buzzer
or turn on a preselected radio station.

Using Alarm with a Preselected Radio Station:
Select desired station using + or - Tuning Button [18] or select one
of the 1-7 presets.
Set the desired volume level using Alarm Level Adjustment [9]
Select alarm system 1 or 2 by pressing the alarm button [14] or [15].
Display will blink with selected alarm
Press alarm set button [16]
Display will blink showing selected alarm hour and alarm mode
and beep
Press alarm Mode button [20] to select alarm mode
Use + or - button [18] to set alarm time hours.
Press set button [16] to set minutes using + or - button to
set minutes.
Press alarm days selections 1-7 (Sunday-Saturday) to select
alarm days.
Display will show the days on which you wish to be awoken by the
radio alarm.
Pressing alarm button 1 or 2 will confirm settings and a beep and
display indicates radio alarm is set.
Note:
If alarm days or alarm mode are not selected display will blink
all the days for a few seconds indicating the alarm is not set
and the alarm will not be activated.
If you would like to be awoken to the station you are presently
listening to press alarm button 1 or 2 for more then 2 seconds.
This allows the station you are listening to be stored into
memory. Then follow above procedures.

Using Alarm with HWS Alarm Beep:
Select alarm system 1 or 2 by pressing the alarm button [14] or [15].
Display will blink with selected alarm Press alarm set button [16]
Display will blink showing selected alarm hour and alarm mode
and beep
Press alarm Mode button [20] to select alarm mode
Use + or - button [18] to set alarm time hours.
Press set button [16] to set minutes using + or - button to
set minutes
Press alarm days selections 1-7 (Sunday-Saturday) to select
alarm days.
Display will show the days on which you wish to be awoken by the
buzzer humane alarm
Pressing alarm button 1 or 2 will confirm settings and a beep and
display indicates buzzer humane alarm is set.
Note:
If alarm days or alarm mode are not selected display will blink
all the days for a few seconds indicating the alarm is not set
and the alarm will not be activated.

Cancelling Alarm Setting:
Alarm functions can be cancelled:
Select alarm system 1 or 2 by pressing the alarm button [14] or [15].
Display will blink with selected alarm
Press alarm set button [16]
Display will blink showing selected alarm hour and alarm mode
and beep
Press alarm Mode button [20] one or two times (depending if you
were in the alarm radio or alarm buzzer mode) till display blinks.
Press alarm 1 or 2 button again to confirm alarm cancellation.
The symbol will stay on the display for about 2 seconds
and disappear.
You may also select days you wish to be or not to be woken after
pressing the Set button while display is blinking. Press 1-7
(Sunday-Saturday) of button [19] to make a selection.

This is the figure of your device and you can find which button where is:




Good luck!
Thanks.
gylacz

E.UP = Under voltage
Check your supply voltage.
E.OC = Over current
Check for shorts between the inverter and motor.

With the display in normal mode showing the time, date and temperature and with the double dots flashing each second, press the MODE button. The first press will give you the option for setting 12 or 24 hours on the time display. The second press should bring up the setting for the alarm time. Press the SET button once and it flashes the hour for the alarm. Press it again and the minutes for the alarm will show. Pressing the SET button a third time lets you set the number for each musical tone choices for the alarm. A fourth press will ' set' the alarm so the alarm time will show, plus the number representing the ring tone you selected below the alarm time. Normally what you would do next is press MODE again 3 times to return to the ordinary time display. But if you want the alarm off, instead of doing this, press SET a fifth time and this will set the alarm time to 'off' and the display for the alarm will show '-:--' now press MODE 3 times or until you see the ordinary time display with the double dots flashing. You can check the alarm is off by pressing the ALARM button - it should still show '-:--'. The ALARM button is only for showing the alarm time which has been set, not for actually doing the setting. A quicker way, starting from the normal display with the seconds flashing on the time, is to just press the ALARM button once, then press SET 5 times then MODE 3 times.

the mode button controls the different functions of the watch.  time, alarm time, stopwatch, timeset, alarmset, in a repeating cycle.  Make sure you are on the time function (seconds ticking and changing every second, but not flashing twice per second.  This is the normal mode that shows the time.
 A press of the lap/reset button (labeled) will show the alarm time, Unpress will show the time of day. Press again toshow the alarm time. Press and hold the lap/reset button will show the alarm time again, but it will hold there.  While holding this lap/reset button, press the start/stop button (labeled). This will turn on (or off) the alarm (tiny indicator).  Press this start/stop button repeatedly (while still holding the lap/reset button and you will see the indicator turning on and off with each press.  Stop this button pressing with the indicator OFF, let up on the lap/reset button, and the time will return to the screen.  The alarm will now be OFF. 

Here is the manual from GAP customer service.

Dear gap.com Customer,
Thank you for your email regarding the Sporty Printed Watch user
instructions. Please accept our apologies that no directions were
received with your order.
The instructions are as follows:
Button Functions:
A. Light
B. Mode
C. Start
D. Reset
Standard Time Adjustment:
1. To set the time, press the Mode button three times (The seconds and
the word Tuesday should start flashing).
2. If the seconds position shows less than 30 seconds, pressing the
Start button will reset the seconds to 00. If the seconds position shows
more than 30 seconds, pressing the Start button will reset the seconds
to 00 and the minutes will increase by 1.
3. Press the Reset button until the area you want to change starts
flashing (i.e., second, minute, hour, day, month, and weekend. Press
Start button once for per unit increment, press and hold for 3 seconds
for speedy advance.
4. At completion, press Mode button to resume standard time display.
To reset the Alarm:
Press the B: Mode button until you reach the alarm.
Press the D: Restart button.
Press the C: Restart button to get back to the time

The instructions that came with my watch didn't work but after playing around with the buttons for a while i final came up with this: Press the mode button for 2 secs. The first display is the alarm. Press mode again and the time shows with the seconds flashing. Use the set button to change seconds, minutes, hours. Use the start/stop button to change from seconds to minutes to hours.This will then take you to change the month, date and day of the week. Mode takes you back to the start (time display). The alarm is changed in the same way.
To change from 12h clock to 24h clock keep the set button pressed (the alarm time is displayed) and press mode, the 'A' will disappear when in 24h mode
When the time is displayed press the start/stop button to show the date.
Not sure how to use the countdown timer or how to stop the alarm yet though!