Rheem 310 - Diagnostic Features and Draining

COMMISSIONING
40
DIAGNOSTIC FEATURES OF THE HEAT PUMP CONTROLLER
An operating mode monitor is located on the front of the heat pump module and houses a green and a red
LED.
The green LED, marked “NORMAL”, indicates the current operating mode (with the red LED off) of the heat
pump water heater and the red LED, marked “ATTENTION”, may indicate a potential fault mode.
The green LED will emit either a solid glow or a series of flashes,
with a 2 second interval between each series. The green LED
may also emit a series of flashes in conjunction with the red LED
to indicate a particular fault condition with the system.
The red LED will emit either a solid glow or a series of flashes,
with a 2 second interval between each series. A series of flashes
indicates there may be a particular fault condition with the
system. A solid glow or 3 flashes (with the green LED off), or
1 flash (with a solid green LED) does not necessarily mean there
is a fault with the system.
The modes are:
Green LED
Red LED
Operational Modes
solid green
(remains on)
off
Standby mode – water is hot
1 x green
off
Call for heating received – system checks performed
Note: Note: if call for heating received, unit may wait and continue flashing until five
minutes has elapsed after its last operation and until the compressor has cooled
2 x green
off
Circulator commences circulation
4 x green
off
Heat pump operation – compressor and fan running
no green
(remains off)
off
No power at the water heater or to the heat pump or a possible fault condition
Refer to notes overleaf before calling for service
Green LED
Red LED
Indicator or Fault Modes
off
solid red
(remains on)
Ambient temperature < 0°C Heating unit on
off
1 x red
Storage tank thermistor fault condition Heating unit on
off
2 x red
Heat exchanger (heat pump) water outlet > 80°C Heating unit on
off
3 x red
Evaporator < -3°C Heating unit on
off
4 x red
Refrigeration system fault 1 Heating unit on
off
5 x red
Refrigeration system fault 2 Heating unit on
off
6 x red
Water flow fault Heating unit on
off
7 x red
Compressor over temperature condition (> 110°C) Heating unit on
solid green
(remains on)
1 x red
Heating stopped due to insufficient flow rate Heating unit off
1 x green
1 x red
Heat exchanger (heat pump) water outlet thermistor fault condition Heating unit on
2 x green
2 x red
Heat exchanger (heat pump) water inlet thermistor fault condition Heating unit on
3 x green
3 x red
Evaporator thermistor fault condition Heating unit on
4 x green
4 x red
Compressor thermistor fault condition Heating unit on
5 x green
5 x red
Ambient temperature thermistor fault condition Heating unit on