Control cable wires crossed

This error is:
Indoor / Outdoor wrong connection
Check that the wiring between the indoor and outdoor have not been crossed over, ie make sure that the same color wire connects the same terminal number on both the indoor and outdoor. After that, check that you are getting full supply voltage to the system. High resistance somewhere in the circuit may not provide sufficient power. Corroded isolator contacts or wire terminals for instance.

Disassembly - Indoor Unit
Disconnect the unit from power supply before making any checks.
Be sure the power switch is set to "OFF".
To remove the Grille from the Chassis.
• Set the up-and-down air discharge louver to open
position (horizontally) by finger pressure.
• Remove the securing screws.
• To remove the Grille, pull the lower left and right
side of the grille toward you (slightly tilted) and lift it
straight upward.
1. Before removing the control box, be sure to
take out the wire screwed at the other end.
2. To remove the Control Box.
• Remove securing screws.
• Pull the control box out from the chassis
carefully.
3. To remove the Discharge Grille.
• Unhook the discharge grille and pull the
discharge grille out from the chassis carefully.
4. To remove the Evaporator.
• Remove 3 screws securing the evaporator(at the
left 2EA in the Eva Holder, at the right 1EA).
• When repair, do not damage the Caution label.
• Unhook the tab on the right inside of the chassis
at the same time, slightly pull the evaporator
toward you until the tab is clear of the slot.
5. To remove the Motor Cover
• Remove 2 securing screw.
• Pull the motor cover out from the chassis
carefully.
6. To remove the Cross-Flow Fan
• Loosen the screw securing the cross-flow fan to
the fan motor (do not remove).
• Lift up the right side of the cross-flow fan and the
fan motor, separate the fan motor from the
cross-flow fan.

H99: Indoor heat exchanger anti-freezing protection
Causes: - Insufficient refrigerant;
- Air filter dirty;
- Clogged cross flow fan.

This could be an inoperative reversing valve or bad reversing valve solenoid coil.

Check your wiring! If it wasn't tripping before and now it is, you have your hot and neutral crossed or neutral and safety ground crossed. You can not draw current via the safety ground, that is what caused the GFCI to trip, it senses current being drawn in that wire.

There is no CS code. Please read as C5.
Fault Code 05 and 53 (CH05 is displayed at indoor unit, 53 is displayed at outdoor unit)
This fault code indicates a communication error between the indoor and outdoor units; this is usually caused
by wiring errors or condensate pumps connected to the inter-connecting cable.
The communication between the units is a fluctuating DC voltage commonly called a serial signal, it can be
easily lost if the wiring is not done correctly. If there is a communication error fault CH05 will appear within 5
mins of powering up the system.
Testing
• Check Outdoor and Indoor Power Supply Voltages ( 230V ±10% ) and correct as necessary.
• Check for any mis-wiring or loose connections and correct as required.
• Check the resistance between communication line and GND. (Normal: Over 2M).
• If one Indoor unit operates normally Outdoor PCB is generally normal.
Turn on the power and start the indoor unit in cooling, set the temperature to 18ºC; the serial communication
signal will only be present for the first 3 mins of operation.
Set your meter to DC Volts, Test between terminals 5 (Red probe) and 2 or Earth (Black probe) of the outdoor
unit, you should see a fluctuating 0-72 Vdc.
If the Voltage is not present disconnect the terminal 5 cable, test the Voltage between this wire (Red probe)
and 2 or Earth (Black probe), you should see a steady voltage in the range of -0.1 to -10.0 Vdc. If No Voltage
is present either the cable or Indoor PCB must be faulty. This can be determined by checking the voltage
output on the Comms terminal of the Indoor unit, with the Comms wire disconnected. If No Voltage is present
the Indoor PCB must be faulty, if present, cable must be at fault.

H-11Indoor / outdoor abnormal communication. Check • Internal / external cable connections
• Indoor / Outdoor PCB

You will have to change out the thermostat wire if you do not have another wire in the sheath you can use.
You must have 2 wires for 24 volts hot and neutral. Usually red and blue.
Yellow for the compressor contactor.
Orange for the reversing valve.
White for the indoor heat coil relay.To bring on indoor coil when in defrost mode.

Split A/C-Cold:

You need four wires(two #10 and two #12) to the outdoor unit, leaving you house, and three wires(#10) coming from the breaker to tye indoor unit inside your house.

Split A/C-Cold and Hot:

You need five wires(two #10 and three #12) to the outdoor unit, leaving your house, and thee wires(#10) coming from the breaker to your indoor unit inside your house.

This ypical arrangment(all of them use three wires fro the breaker), yet there are other units which may require 6-7 wires connected to the the outdoor unit depends on the added features to the unit.

Regards,

Gulftecheng