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Order No. PHAAM1008001T0
Air Conditioner
S-22KA1E5 S-22KA1E5S
S-28KA1E5 S-28KA1E5S
S-36KA1E5 S-36KA1E5S
S-45KA1E5 S-45KA1E5S
S-56KA1E5
S-63KA1E5
S-71KA1E5
Subject: Not Constant of Room Temperature: During Heating Mode
WARNING
This service information is designed for experienced technicians only and is not designed for used by the general public.
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a
product. Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to
service or repair the product or products dealt with in this service information by anyone else could result in serious injury or
death.
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a
product. Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to
service or repair the product or products dealt with in this service information by anyone else could result in serious injury or
death.
CONTENTS
Page Page
1.
Phenomenon ............................................................... 1
2.
Remedy ........................................................................ 2
1. Phenomenon
During heating mode operation, when there is a large temperature difference between the temperature detected by indoor unit
intake air temperature sensor, and the room ambient temperature, it will not easy to maintain a constant room temperature.
intake air temperature sensor, and the room ambient temperature, it will not easy to maintain a constant room temperature.
!
2
2. Remedy
The indoor unit intake air temperature sensor can be re-positioned to reduce the large temperature difference.
Please follow procedures below to secure the indoor unit intake air temperature sensor at the new position:-
Please follow procedures below to secure the indoor unit intake air temperature sensor at the new position:-
(a) Open the indoor
unit control board front
cover, and reposition
the indoor unit intake
the indoor unit intake
air temperature sensor
(CWA50C2687).
(a) Exit of the
indoor unit intake
air temperature
sensor lead wire.
(b) The sensor lead
wire is wrapped (one
round) around the
rib of control board.
STEP 1
STEP 2
STEP 3
(a) Remove the indicator & receiver
electronic controller (CWA745769) and
disconnect the 7 segment display lead
wire. Then, the 7 segment display lead
wire is routed at inner-position.
(b) The sensor lead wire
is inserted in the rib (on
top of the 7 segment
display lead wire).
Reinstall the indicator & receiver
electronic controller (CWA745769)
to the indoor unit control board.
STEP 4
(b) Disconnect the
lead wire from the
stepping motor.
STEP 5
Reconnect the
stepping motor lead
wire as shown
STEP 6
Reconnect the
lead wire to 7
segment display.
Display