Johnson Controls HVWHP072B32S - Page 41

SM-18006
3-21
TROUBLESHOOTING
7-Segment Display
<Instance of Unit No. 63, Alarm Code “01”>
SEG2: Indoor Unit No. (0~63)
SEG1: Alarm Code
SEG1
Alarm CodeIndoor Unit No.
SEG2
(D) SEG1 and SEG2 are as follows.
SEG1
Alarm Code
SEG2
1 * Turn on All Indoor Units * All the Indoor Units Connected in the Same System
During auto-addressing, the following items can be checked using the
water source unit's on-board 7-segment LED display
(1) Disconnection of power supply to the indoor unit.
(2) Reverse connection of the communication cable between the water source
and indoor units.
In this instance, "03" appears after 30 seconds
(3) Duplication of indoor unit number. See Alarm Code 35.
Water Source Unit
Printed Circuit Board
(PCB)
2 Turn on the Water Source Unit
3 Auto-addressing Starts
Normal
Case
(1) The water source unit's on-board 7-segment LED display is not indicated.
Abnormal
Instance
(2) The water source unit's on-board 7-segment LED display indicates the following if there is
something wrong.
(A) Alarm code is displayed on the 7-segment LED display when an alarm is received from
an indoor unit in normal mode.
As for the following alarm codes, however, an alarm code is displayed on the 7-segment LED
display when an alarm is detected by an water source unit itself.
* Alarm Code “03” (Abnormal Communication between Indoor Unit and Water Source Unit)
* Alarm Code “35” (Incorrect Indoor and Water Source Unit No. Setting)
(B) Alarm code of lower number indoor unit Address No. is displayed when alarm is received from
multiple indoor units.
(C) The following 7-segment LED display appears and flashes every 0.5 seconds.
● SimpleCheckingusing7-SegmentDisplay