A.O. Smith CAHP-120 Series, Руководство пользователя

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drained by the T&P relief valve, or otherwise the water heater or the tube system will be
damaged.
For this condition, refer to the local code or consult with the inspection agency to
determine which system can be accepted in the area. This includes:
a) Install the second T&P relief valve and set the pressure lower than the pressure setting of
the first T&P relief valve.
b) Install an expanded tank with appropriate pressure to relief the heat expansion.
4. Check the heating elements for leakage. If you cannot find the reason by yourself,
a) Please disconnect the power supply to the heater.
b) Close the water supply valve of the water heater.
c) Contact with the supplier.
7.5 Diagnostic Codes
Table 7.1
DISPLAY INDICATES CORRECTIVE ACTION
AMB SHORT Ambient temperature sensor is short. Call the service phone.
AMB OPEN
Ambient temperature sensor is open. Call the service phone.
AMB ADERR Ambient temperature AD channel is error. Call the service phone.
DIS SHORT
Discharge temperature sensor is short. Call the service phone.
DIS OPEN Discharge temperature sensor is open. Call the service phone.
DIS ADERR Discharge temperature AD channel is error. Call the service phone.
HIGH PRESSURE
Compressor is protected for high pressure. If it cannot recover within one hour, call the service phone.
LOW PRESSURE Compressor is protected for low pressure. If it cannot recover within one hour, call the service phone.
HIGH DISTEMP
Compressor is protected for high discharge
temperature.
If it cannot recover within one hour, call the service phone.
FAN LOST Fan motor is unconnected. Call the service phone.
COMPRE LOST Compressor is unconnected. Call the service phone.
SUC SHORT
Suction temperature sensor is short. Call the service phone.
SUC OPEN Suction temperature sensor is open. Call the service phone.
SUC ADERR
Suction temperature AD channel is error. Call the service phone.
COND OVERFLOW Condensate water flow out of the drain pan. Call the service phone.
LOW VOLTAGE Low voltage alarms. It will recover automatically.
HIGH VOLTAGE
High voltage alarms. It will recover automatically.
COIL BLOCKED Heat exchanger is blocked. Call the service phone.
LOW WATER Water lever in tank is low.
Disconnect the power and charge enough water, and then
connect the power supply.
ECO ECO is error. Call the service phone.
UPPER SHORT Upper tank temperature sensor is short. Call the service phone.
UPPER OPEN
Upper tank temperature sensor is open. Call the service phone.
UPPER ADERR Upper tank temperature AD channel is error. Call the service phone.
CRYSTAL ERR Crystal is error. Call the service phone.
RAM EER
RAM memory is error. Call the service phone.
ROM EER ROM memory is error. Call the service phone.
VERY LOWVOLT
Extra low voltage alarming. It will recover automatically.