Carrier 38QUS012D8S Service Manual page 106

The system checks the water level every 5 seconds.
----When the A/C operates in cooling (including auto cooling) or forced cooling mode, the pump begins
running immediately and continuously until cooling stops.
----If the water level increases up to the control point, the LED displays an alarm code and the drain pump
opens and continually monitors the water level. If the water level falls and LED alarm code is no longer
displayed (drain pump close delay is 1 minute), the unit goes back into its last mode. Otherwise, the entire
system (including the pump) stops and the LED displays an alarm again after 3 minutes.
1.3.10 Follow Me(Optional)
If you press "Follow Me" on the remote, the indoor unit will beep. This indicates the follow me function is
active.
Once active, the remote control will send a signal every 3 minutes, with no beeps. The unit automatically
sets the temperature according to the measurements from the remote control.
The unit will only change modes if the information from the remote control makes it necessary, not from the
unit's temperature setting.
1.3.11 Outdoor Unit Point Check Function(Excluding 12K&18K models)
A check switch is included on the outdoor PCB.
Push SW1 to check the unit's status while running. The digital display shows the following codes each time
the SW1 is pushed.
N
00 Normal display
01 Indoor unit capacity demand code
02 Amendatory capacity demand code
The frequency after the capacity requirement
03
transfer
04 The frequency after the frequency limit
05 The frequency of sending to 341
Indoor unit evaporator
06
(heating T2，cooling T2B)
07 Condenser pipe temperature (T3)
08 Outdoor ambient temperature (T4)
09 Compressor discharge temperature (T5)
10 AD value of current
11 AD value of voltage
12 Indoor unit running mode code
13 Outdoor unit running mode code
14 EXV open angle
Electrical Control System
Display
outlet temperature
Displays running frequency, running state, or malfunction code
Actual data*HP*10
If a capacity demand code is higher than 99, the digital display
shows single and double digits.
For example, if the digital display shows "5.0", the capacity
demand is 15. If the digital display tube shows "60", the
capacity demand is 6.0.
If the temperature is lower than -9 ℃, the digital display shows
"-9." If the temperature is higher than 70 ℃, the digital display
shows "70." If the indoor unit is not connected, the digital
display shows: "――"
The display value is between 0–129 ℃. If the temperature is
higher than 99 ℃, the digital display shows single and double
digits.
For example, if the digital display shows "0.5", the compressor
discharge temperature is 105 ℃.
If the digital display shows "1.6," the compressor discharge
temperature is 116 ℃.
The display value is a hexidecimal number.
Off:0, Fan only: 1,Cooling: 2, Heating: 3, Forced cooling: 4,
Dry: 6, Self-clean: 8, Forced defrosting: 10
Off:0, Fan only: 1,Cooling: 2, Heating: 3, Forced cooling: 4,
Dry: 6, Self-clean: 8, Forced defrosting:10
Actual data/4.
Electrical Control Function
Remark
104