Malfunction Possible cause
Checks
Remedial measures
Major
E03
Medium flow disturbance
Check:
- Air in the medium piping
- Open shut-off devices
- Medium pressure
- Circulation pump capacity
- Medium flow rate
- Flow monitor
- Bleed medium cycle
- Open shut-off valves
- Increase medium pressure
- Have circulation pump,
medium flow rate and
flow monitor checked by
a specialist company.
X
E07
Frost protection triggered
Is the supply temperature
greater than or less than 4°C?
Raise return flow
temperature, increase
medium flow rate, adjust
anti-freeze temperature to
the operating medium.
X
P81
Heat gas overtemperature
Check:
- Heat gas temperature (U04)
- Heat gas temperature probe,
probe resistance
- Refrigerant quantity
- Replace heat gas
temperature probe
- Fill refrigerant to operational
levels after rectifying
the cause of the problem
X
E44
Heating system dropped below
bottom operating limit
Outside temperature below
-20°C?
E21
Low voltage fuse triggered
Check:
- Voltage on R/S/T on
the inverter board
(min 300V)
Establish stable power supply
on the supply line
- Replace inverter board
E22/23
Overflow protection
Check:
- Current consumption of
the complete system
- Restart system
E24
DC bus overvoltage protection
triggered
Check:
- Voltage at R/S/T on
the inverter board
(max 500V)
- Voltage between DCP-IN
and DCN-IN on the inverter
board (max 800V)
Establish stable power supply
on the supply line
- Replace inverter board
E25
Inverter board low voltage
protection device triggered
Check:
- Voltage at R/S/T on the
inverter board
(min 210V)
- Voltage between DCP-IN
and DCN-IN on the inverter
board (min 300V)
Establish stable power supply
on the supply line
- Replace inverter board
E27
IPM overcurrent protection
Check:
Compressor current draw,
Pressure difference, high/low
pressure
- Reduce pressure difference
by raising the low pressure or
lowering the high pressure
E28
IPM overheating protection
Check:
- Function of the fan
- Air throughput
- Ensure that there is
adequate distance at the fan
inlet and outlet
- Clean the finned heat
exchanger
E30 / E31
Overheating of the control
electronics
Check:
- Function of the fan
- Air throughput
- Ensure that there is
adequate distance at the fan
inlet and outlet
- Clean the finned heat
exchanger
REMKO series RVS
38
Summary of Contents for RVS 130 DC
Page 2: ......
Page 41: ...Dimensions Unit dimensions RVS 50 DC RVS 80 DC RVS 130 DC RVS 180 DC 41 ...
Page 43: ...43 ...