185
A.174 Interior temperature too high
A.174
System characteristics
■
Reduced heating output/cooling capacity
■
Interior temperature too high
Cause
Inverter cooling faulty (fan)
Measures
1. Check inverter heat sink and fan for dirt. Clean if
necessary.
2. Replace the fan.
3. Replace inverter.
Service messages
Message Meaning
P.1 Maintenance due according to time interval.
P.4 Top up heating water.
P.8 Maintenance due according to hours run.
P.34 Heating water filter maintenance:
■
Clean the filter in the ball valve.
■
Clean the on-site heating water filter (accessory).
Status messages
Message Meaning
S.60 Summer mode active (outside temperature economy function)
S.74 Heating suppression, heating with DHW heating by solar collectors
S.75 DHW circulation pump active
S.88 Solar circuit pump active
S.89 Solar collectors in stagnation
S.112 Initialisation of 4/3-way valve
S.113 4/3-way valve switches to "DHW heating" .
S.114 4/3-way valve switches to "Heating/cooling circuit 1" .
S.115 4/3-way valve in position "DHW heating"
S.116 4/3-way valve in position "Heating/cooling circuit 1"
S.117 4/3-way valve in position "Heating/cooling circuit 2"
S.118 4/3-way valve in position "Integral buffer cylinder"
S.120 Smart Grid: Standard mode active
S.121 Smart Grid: Recommended mode active
S.122 Smart Grid: Forced operation active
S.123 Heat pump off
S.124 Heat pump pre-run phase
S.125 Heat pump in heating mode
S.126 Heat pump in cooling mode
S.127 Heat pump: Prepare for defrosting.
S.128 Heat pump in defrost mode
S.129 Heat pump run-on phase
Messages
Warning messages (cont.)
6218234
Diagnosis
To Next Page