Fan Motor - Carrier 42N_S Installation And Operation Manual

Controls
Diagnostic warnings
The following alarm situations are indicated:
Defective sensors: the red LED flashes.
Possible causes:
failure or short circuit of internal or remote sensor;
failure or short circuit of water temperature sensor (optional and only
on type "A" control).
Incorrect configuration
The yellow LED flashes.
This happens when:
in type "A" control, both centralised seasonal changeover signals "RC
and RH" are enabled.
Electric heater
Electric heaters are controlled by "B"-type CARRIER control.
The electric heaters are equipped with two safety thermostats, one
with automatic reset, the second with manual reset, to protect the unit
against overtemperature that may happen in case of incorrect filter
cleaning or obstructions of the air flow.
NOTES:
In the size 15 unit with "HIGH -LOW POWER" heating element,
the ULOW and LOW speed wire (RED AND YELLOW MOTOR WIRE)
must be disconnected and insulated.
In case of failure in the electric fan, replace the electric heater too.
Only qualified personnel should carry out this operation.
T-o access the control box panel, remove the screw located at the
bottom of the cover and delicately bend the tab to remove the cover.

Fan Motor

The units have tangential/centrifugal motors with selectable speeds.
There are 5 speeds available:
For sizes S15-S20-S30-S45, there are 5 available speeds Ultra Low- Low-
Medium-High-Super High (see table on the right).
All machines are configured at the factory as follows:
ULTRA LOW - MEDIUM – SUPER HIGH.
In the case of particular needs, it is possible to move the speed
connections (with Faston quick-connectors) following the enclosed
table and relative drawing (see Fig. 29).
For sizes S26-S42-S65 3 speeds are available: Low-Medium-High (see
tab. on the side).
For size 15 with electric heater the only wiring possible is reported on
table on the side and fig. 29b.
22 42N_S 42N_E
Autotest
The autotest function is activated by holding the seasonal changeover
button pressed and at the same time pressing the " " button three
times within 1 second.
In this way it is possible to check the starting of all fan coils.
The blue and red LEDs will begin to flash.
Each of the various units will be activated for 10 seconds in the following
sequence:
Low fan speed.
Medium fan speed.
High fan speed.
CV Motorized cold-water valve.
HV Motorized hot-water valve, or electric heater (only type "B"
control versions).
Elapsed 1 minute the control ends the test mode.
Connect the power supply to the electric heater terminal. Size the
cables according to current drawn (see table III "Technical data of
electric heater).
It is important not to obstruct the supply or air flow and to
periodically check that the filter is clean.
NOTE:
The simultaneous use of hot water and electric heater is possible
in "ONLY LOW POWER" mode. Electric heaters and hot water can
not be used in high power mode. To operate the additional heating
function you need to buy the 42N9084 kit and connect the special
sensor as described in the installation manual. After this, the
corresponding dip switch no. 5 of the type B control must be set to
ON.
Motor 5 speed
CABLE COLOR
MOTOR SPEED
ENGINE
ULTRA LOW RED
LOW YELLOW
MEDIUM WHITE
HIGH ORANGE
SUPER HIGH BLACK
MOTOR NEUTRAL BLUE
Motor 3 speed
MOTOR SPEED CABLE COLOR
ENGINE
HIGH BLACK
MEDIUM WHITE
LOW RED
MOTOR NEUTRAL BLUE
ONLY FOR SIZE 15
FACTORY
WHIT ELECTRIC
CONNECTION
HEATER
RED -
-
WHITE RED
WHITE
BLACK BLACK
BLUE BLUE
FACTORY
CONNECTION
BLACK
WHITE
RED
BLUE