Messages; Red Led On The Heat Pump Control Unit; Messages On The Programming Unit - Viessmann Vitocal 060-A Installation And Service Instructions For Contractors

Troubleshooting

Messages

Red LED on the heat pump control unit

Fig. 25
Red LED
A
Red LED Cause
Flashes briefly No fault
every 10 s.
Flashes in a dif- Fault
ferent se-
quence.
Constantly off No power supply

Messages on the programming unit

Message Cause
"ER 0" Programming unit faulty
"ER 1" Safety high pressure switch has responded.
Overpressure in the heat pump circuit.
"ER 2" High limit safety cut-out has responded.
Overheating of the DHW cylinder.
"ER 3" Short circuit/lead break, top cylinder temperature
sensor (NTC1)
"ER 4" Short circuit/lead break, air intake temperature
sensor (NTC2)
"ER 5" Short circuit/lead break, evaporator temperature
sensor (NTC4)
"ER 6" Short circuit/lead break, bottom cylinder temper-
ature sensor (NTC3)
36
A
Measure
No action required
See message on the programming unit
Restore power supply.
Measure
Replace programming unit.
Switch power supply OFF and ON again.
Or
Acknowledge message. See the following
chapter.
Ensure DHW is being drawn.
Reset high limit safety cut-out (see
page 39).
Check resistance value and replace sensor
if necessary (see page 41).