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12-6
CONTROL SYSTEM
SM DLSDCI 3-A.1 GB
12.2.3.9 Base Heater
Heating element designed to melt any ice that is accumulated on the outdoor unit base during low
heating operation.
The base heater will be working only when RV is “ON” according to the following graph:
ON
OFF
OAT
0
2
Base
Heater
When OAT is faulty the base heater will be “ON” continuously in HEAT mode.
12.2.3.10 Cranckcase Heater
Heating element designed to heatup the compressor oil cranck case during low outdoor ambient
temeratures.
The crank case heater operates only when compressor is off and according to OAT and CTT as following:
TROUBLESHOOTING
Service Manual
Multi Cinco 100 DCI
12-5
Revision 0
12.2.3.8
Temperature Sensors
T
T
C
n
o
i
t
c
A
OAT OCT
OMT
HST RGT RLT ICT
RAT
Compressor Speed Cool
P + + P P
Compressor Speed Dry
P + + P +
Compressor Speed Heat
P + P P +
OFAN Speed Cool
P + + P
OFAN Speed Heat
+ + P
EEV Cool
+ + + + +
EEV Heat
+ + + + +
Deicing
+ + + P
Base Heater
+
Cranck case Heater
+ +
Indoor load (NLOAD)
+
IFAN Speed (Heat)
+
Heating Element (Indoor)
+
P – Sensor is acting only for protection.
+ - Sensor is active part of the control.
12.2.3.9
Base Heater
Heating element designed to melt any ice that is accumulated on the outdoor unit base
during low heating operation.
The base heater will be working only when RV is “ON” according to the following graph:
ON
OFF
OAT
0
2
Base
Heater
When OAT is faulty the base heater will be “ON” continuously in HEAT mode.
12.2.3.10
Cranckcase Heater
Heating element designed to heatup the compressor oil cranck case during low outdoor
ambient temeratures.
The crank case heater operates only when compressor is off and according to OAT and
CTT as following:
In case of OAT failure - CTT is used for the operation, OAT ignored.
In case of CTT failure - Coil heating is disabled.
•
In case of OAT failure - CTT is used for the operation, OAT ignored.
•
In case of CTT failure - Coil heating is disabled.