Komfovent VERSO-P, Инструкция по установке и обслуживанию

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17
V2-C5-15-03-v1
No. Message Probable cause
Possible solution
in heating mode
Possible solution
in cooling mode
F1
Heat pump works
regulary but with an
insufficient capacity
Low air flow. Increase supply and (or) extracted air flow .
F2 Low level of refrigerant. See C8.
F3 4-way valve failure. Check 4-way valve coil. Check 4-way valve and replace if necessary.
F4
Defrost solenoid valve
is open.
Check solenoid valve coil. Check solenoid valve and replace if
necessary.
G1
Frost in compressor
suction line
Expansion valve does
not work properly.
Check and replace if necessary.
G2
Refrigerant filter
clogged.
Check and replace if necessary.
G3 Evaporator obstructed. Clean evaporator surface.
H1
Abnormal noises in
heat pump system
Components vibrate. Fasten properly.
H2
The compressor is
noisy.
Replace the compressor.
– the cause must be eliminated only by qualified person.
Air handling unit with built-in heat pump operation description
Heat pump built-in air handling unit are controlled by air set point temperature. Heating or cooling function are
activated automatically by set point and demand.
Temperature control order:
1. Rotary heat exchanger;
2. Heat pump;
3. Additional cooler or heater (if installed).
If the unit operation point are close to critical conditions, the required air temperature may not be reached. Unit
automatically activate safe operation conditions maintenance function.
In the heating mode evaporator defrosting cycle are determined. Defrosting frequency depends from opera-
tion conditions. When defrost mode are activated supply air temperature decreases.
If unit will be operating below -5 °C outside air temperature, it‘s recommended to install additional heater.
Heat pump start up may be delay due to refrigerant low pressure or low exhaust air temperature. This causes
are not indicated in controller as alarm. When conditions change to necessary conditions he pump will start up au-
tomatically. If heat pump capacity are restricted by controller, additional cooler or heater are turned on (if installed).
Heat pump capacity depends from air flow. It‘s not recommended to use units with high air flows difference
between supply and extract air. If there are high difference between supply and extract air flows, heat pump ef -
ficiency and capacity decreases or heat pump may not work properly.
If the unit are operating with low air flows, it is recommended to use OVR function.
•
Heat pump capacity can be limited by reducing the supply or (and) exhaust air volume.
• By reducing the air flow below 40 percent of the nominal – the heat pump is switched off.
• By reducing the air flow below 60 percent of the nominal – the heat pump power is limited.
• The heat pump operates at full power when the air is more than 60 percent provided.