Other Phenomena - Normal - A.O. Smith CAHP-MC-38 Installation, Operation And Maintenance Instructions

E0X-14 RESERVED
E0X-15 POWER SUPPLY PROTECTOR
ERROR
E0X-16 COMPRESSOR OVERLOAD
PROTECTION
DISCHARGE TEMPERATURE
E0X-17
OVERHEAT
E0X-18 RESERVED
E0X-19
OUTLET WATER TEMPERATURE
OVERHEAT
E0X-20 ABNORMAL HEATING ALARM
AMBIENT TEMPERATURE OUT OF
E0X-21
RANGE
E0X-22 EVAPORATOR DIRTY ALARM
E0X-23 EVAPORATOR BLOCK ALARM
12.2. Other Phenomena – Normal
Phenomena
The tank temperature is
lower than the setting point
when heat pump units stop.
Heat pump units stop under
low ambient temperature.
The wrong phase sequence or
incorrect phase of the power
supply.
1. Loose wiring of the overload
protection relay.
2. Higher compressor current.
3. Bad overload
relay.
1. Refrigerant leakage.
2. Non-condensing gas in the
refrigerant system.
3. Inproper installation of the
temperature sensor.
1. Low water flow rate.
2. Dirty water filter.
3. Scalling condenser.
1. Improper installation of the
water temperature
sensors.Improper
installation of the water
temperature sensors.
2. The four way reversing valve
is not in heating status.
1. The actual ambient
temperature is out of
o
-10-48 C.
2. Bad ambient temperature
sensor.
The evaporator coil is dirty.
The evaporator coil is very dirty.
Possible Reason
This is normal since the heat
pump will stop for protection if
the condensing pressure is too
high.
This is normal phenomeno. The
heat pump units will stop and
enter the defrosting cycle to
5. Replace the low pressure
switch.
Inspect the power supply system.
1. Inspect the wiring and fix.
2. Inspect
wiring.
protection 3. Replace the relay.
1. Perform the leakage
detection and recharge the
refrigerant.
2. Vacuum the system and
recharge the refrigerant.
3. Inspec the sensor
installation.
1. Inspect the water piping and
the pump selection.
2. Clean the water filter.
3. Clean the condenser.
1. Inspect
temperature
installation (on each heat
pump unit and on the tank).
2. Power on and power off the
four way reversing valve for
a few times.
1. Measure the actual ambient
temperature by other
temperature meters.
2. Replace the ambient
temperature sensor.
Clean the evaporator coil.
Solutions
Install the auxillary heaters to
heat the water to desired
temperature if a higher water
temperature is requested.
No actions needed.
the compressor
all the water
sensor