Air Source Heat Pump Water Heater
41
Table 18-3
Please contact the C
&H
appointed service center in case of any of following
conditions.
Malfunction phenomenon
Malfunction analysis
The water heater can
’t turn on and
the wired controller displays EC
The unit hasn
’t been deciphered.
Please change to use the wired
controller with password input function
to decipher the unit.
The water heater stops operation and
the wired controller displays E1
High pressure protection
The water heater stops operation and
the wired controller displays E3
Refrigerant-lacking protection
The water heater stops operation and
the wired controller displaysC5
Malfunction of jumper cap
The water heater stops operation and
the wired controller displays E4
Discharge protection
The water heater stops operation and
the wired controller displays E5
Overload protection of compressor
The water heater stops operation and
the wired controller displays E6
Communication malfunction
The water heater stops operation and
the wired controller displays F3
Malfunction of outdoor ambient
temperature sensor
The water heater stops operation and
the wired controller displays F4
Malfunction of discharge temperature
sensor
The water heater stops operation and
the wired controller displays F6
Malfunction of tube temperature
sensor for outdoor heat exchanger
The water heater stops operation and
the wired controller displays Fd
Malfunction of suction temperature
sensor
The water heater stops operation and
the wired controller displays FE
Malfunction of upper temperature
sensor of water tank
The water heater stops operation and
the wired controller displays FL
Malfunction of lower temperature
sensor of water tank
The water heater stops operation and
the wired controller displays L6
Unit’s capacity is insufficient
The water heater stops operation and
the wired controller displays PL
Low voltage protection for drive DC
bus bar of inverter compressor or
voltage dropping malfunction
The water heater stops operation and
the wired controller displays PH
High voltage protection for drive DC
bus bar of inverter compressor
The water heater stops operation and
the wired controller displays PA
Drive DC current protection of inverter
compressor (input side)
The water heater stops operation and
the wired controller displays H5
Drive IPM module protection of
inverter compressor
The water heater stops operation and
the wired controller displays HC
Drive PFC protection of inverter
compressor
The water heater stops operation and
the wired controller displays Lc
Failure startup of inverter compressor