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Model No.: AC-PR12HM
Version: 1.0
TROUBLE SHOOTING GUIDE
1 Refrigeration cycle diagram.
2 Electrical function
a. Electric Control working environment
i. Input voltage: 187~264V for 50Hz models and 97~127V for 60Hz models;
ii. Input power frequency: 50Hz or 60Hz;
iii. Ambient temperature: -7°C~+43°C for cooling only with electric heater models and
10°C~+43°C for cooling only models;
iv. Indoor fan normal working amp is less than 1A;
v. Outdoor fan. Normal working amp is less than 1.5A;
vi. Compressor: single-phase power supply. Its normal working amp is less than 10A;
b. Proper symbols and their meanings:
i. TA: Indoor ambient temperature
ii. TC: Indoor evaporator temperature
iii. TS: Setting temperature through the remote controller
c. Systematic functions
i. Remote receiving (Optional)
ii. LED displaying and alarm
iii. On or off Timer
iv. Protection for the compressor
v. Water full alarm Anti-icing function at cooling mode. Temperature sensor err
self-diagnose. Both temperature mode display
d. Protection
i. The compressor functions protection with a delay of three minutes.
ii. Sensor protection at open or short circuit.
iii. Evaporator anti-icing protection at cooling mode.
iv. Water full alarm. There are two water position switches used in the unit. One detects the
water depth in the chassis and the other detects the water in the tank.
¾ Water full alarm will be on when the unit is standing by or operating.
¾ When the water adds up to the first position on the chassis, the pump will be
activated. If the water drops down through the position, the pump will be on and stop
after 2 minutes.
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