MCAC-RTSM-2013-12 Midea High-temperature Direct-heating Heat Pump Water Heater Technical Manual
46
7. Main control board spot check
System operation parameters
Normal display Water out temperature
Value of T5 (Just for main unit)
Electric heating tube temperature
Compressor discharge temperature
Setting water temperature
Circulate heat starting temperature
Opening of electric expansion valve
Value of electric expansion valve opening / 8
Opening of electric water flow valve
Value of electric water flow valve opening / 32
0: Stand by 1: Direct heating mode 2:Circulate
heating mode
0: OFF 1: Low 2:Middle 3:High
Elevation of water surface
0:Lower than S4 1: Between S4 and S3
2:Between S3 and S2 3:Between S2 and S1
4:Higher than S1
The last error code or protection code
Display the latest error code or protection code.
If there is no code, display “--”
The leakage switch is
switched off, which resulted
in the impossible of
switching in.
The input of the leakage switch is not equal to
the output.
1. Check whether the neutral line is connected
through the output end of leakage switch. The
neutral line is not allowed to couple in the unit
bypassing the leakage switch.
Connect the neutral line out from the
output end of the leakage switch.
2. The live line and neutral line in the same
power use equipment are coupled in different
output end of the leakage switch.
2. Connect the live line and neutral line in
the same power use equipment out from
the same output end of leakage switch.
Wire controller screen is
kept on initializing, and the
display of the water level
changes between the zero
grade and the fourth grade
continually.
1. Both the main unit and the slave unit of the A
and B power lines of wire controller are connected
1. Dismantle the A and B power lines of
the slave unit.
2. The address codes of the main unit and the
slave unit are set improperly (or no adjustment
is carried out, each unit is set to 0 before
delivering, and the default is the main unit).
2. The S1 on the panel of the main unit is
set to 0, and the DIP switches on the
panel of the slave units are set to 1, 2,
3…
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