M, S, T,
Power on, switch on, switch off, power off
Increase, manual reset (2 combination), factory parameter set (3 combination）
Reduce, manual reset (2 combination)
Mode selection, auto-restart setting, factory parameter set （ 3combination ） and
Parameter setting, adjust clock, query malfunction, password and code confirmation
Temp setting, query temp, factory parameter set（3combination）,parameter setting
Cooling sign. In standby state, press button M, and when the cooling sign flashes, press button S to
confirm. Thus the wording mode is set to cooling mode.
Heating sign. In standby state, press button M, and when the heating sign flashes, press button S to
confirm. Thus the wording mode is set to heating mode.
Auto-mode sign. In standby state, press button M, and when the auto sign flashes, press button S to
confirm. Thus the wording mode is set to auto mode. In auto mode, the system will adjust to enter the
cooling/heating mode according to the difference between the cooling/heating changeover
temperature and the water return temperature.
Temperature-setting sign. In standby or running state, press button T to enter the water return
temperature setting mode, the sign will flash. Adjust the temperature with button ∧/∨and confirm
with button S to quit the setting mode.
Factory parameter-setting sign. Enter the password of the factory parameter setting, and then you
can enter the factory parameter- setting mode.
Alarm sign for malfunction signal. This sign with the other signs together can indicate all kinds of
malfunctions such as communication, water flow, high pressure, low pressure, compressor
overload, fan motor overload, discharging overheat, temperature sensor failure, etc.
Alarm sign for serious malfunction. When a consumable malfunction signal appears 3 times within
30 minutes, the serious malfunction sign will flash to hint that you only can reset in manual after