Instructions
The condenser must be checked at least once a
year for clogging and be cleaned if deemed ne-
cessary. Access to the internal side of the conden-
ser takes place through the fan door. Microchan-
nel coils tend to accumulate dirt on the surface
rather than inside, which makes them easier to
clean than fin-&-tube coils.
• Switch off the unit at main switch before ope-
ning the fan door.
• Remove surface dirt, leaves, fibres, etc. with
a vacuum cleaner, equipped with a brush or
other soft attachment. Alternatively, blow com-
pressed air through the coil from the inside out,
and brush with a soft bristle. Do not use a wire
brush. Do not impact or scrape the coil with the
vacuum tube or air nozzle.
(WD1) - OP-MPLM028-035-044, OP-MPPM028-035-044
A1 : RFI Filter (Compressor)
A2 : Frequency Converter
A3 : RFI Filter (Controls)
A4 : Optyma
™
Plus Controller
B1 : Condensing Pressure Transducer
B2 : Suction Pressure Transducer
B3 : High Pressure Switch
B4 : Low Pressure Switch
B5* : Fan Speed Controller / Pressure
Switch
6 | © Danfoss | DCS (CC) | 2018.06
If the refrigerant system has been opened, the sys-
tem has to be flushed with dry air or nitrogen to re-
move moisture and a new filter drier has to be ins-
talled. If evacuation of refrigerant has to be done, it
shall be done in such a way that no refrigerant can
escape to the environment.
15 - Warranty
Always transmit the model number and serial nu-
mber with any claim filed regarding this product.
The product warranty may be void in following
cases:
• Absence of nameplate.
• External modifications; in particular, drilling,
welding, broken feet and shock marks.
• Compressor opened or returned unsealed.
• Rust, water or leak detection dye inside the
compressor.
C1 : Run Capacitor (Fan)
F1 : Fuse (Control Circuit)
K1 : Contactor
M1 : Compressor
M2 : Fan Motor
Q1 : Main Switch
R1 : Ambient Temp. Sensor
R2 : Discharge Temp. Sensor
R3 : Suction Temp. Sensor
• Use of a refrigerant or lubricant not approved
by Danfoss.
• Any deviation from recommended instructions
pertaining to installation, application or main-
tenance.
• Use in mobile applications.
• Use in explosive atmospheric environment.
• No model number or serial number transmitted
with the warranty claim.
16 – Disposal
R4,R5 : Auxiliary Temp. Sensor
(optional)
R6 : Crankcase Heater
R7 : Oil Separator Heater
S1 : Room Thermostat (optional)
X1 : Terminal
Danfoss recommends that condensing
units and oil should be recycled by a sui-
table company at its site.
Supply : Supply
Fan : Fan
Alarm : Alarm
Comp. : Compressor
CCH : Crankcase Heater
Aux : Auxiliary
FRCC.PI.041.A4.02