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暖气的问题# Living
c*g
1


haha
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x*i
2
著名的F家,提交了都没看到petition letter。不知长啥样。 直接
PP。 NSC,求祝福! 过了的话一定把经验分享大家。
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z*e
3
请教各位一个问题。家里的暖气运行很短时间就停了,过一会儿又运行,就是这样循环
,温度还没有到设定的问题,昨天晚上我设定67度,然后早上7点自动设定成71度,可
是7点起床发现家里的温度只有61度,thermostat 上显示的是heat on,但是就是一会
运行一会停,到不了设定的温度。我家用的是lennox 的harmony iii 控制zone的,根
据上面的code,是DAS(discharge air sensor) open or shorted,我觉得是DAS在温度
高的时候断开了,furnance就停了,等温度降了下来,DAS又回复了正常。我现在的
furnance和DAS都是2012年安装的, DAS坏的可能性大吗,还是可能是其他的问题 ?多
谢了。
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l*l
4
是头像里的吗?
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R*d
5
祝福
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d*j
6
Go to the zone control board , open the cover and find two switches, the one
controls heating mode, another for the cooling mode. Focusing on the
heating mode switch, the scale should not over 140F for a 90% high
efficiency furnace, you should check the user manual before adjusting the
switch, you can Increase to 120F /130F if the current setting at 110F, be
sure to double check the user manual. If the issue still exists, you need to
pull out of a sensor wire from a panel and keep others on, and nail down
which zone has the problem.
When you change the temperature of the sensor, the stage of blower has
change accordingly. It may be a little complicated if you are not a
prefeesional, it could have sensor issue, or a damper becomes bad.
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A*d
7
木看到

【在 c******g 的大作中提到】
: 恩
:
: haha

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S*y
8
祝福
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z*e
9

:Go to the zone control board , open the cover and find two switches, the
one controls heating mode, another for the cooling mode. Focusing on the
:heating mode switch, the scale should not over 140F for a 90% high
非常感谢回复。这个heating mode switch是用来控制discharge air sensor的温度吗?
如果现在是110F的话,就是说discharge air sensor在110F的时候就断开吗?
:efficiency furnace, you should check the user manual before adjusting the
:switch, you can Increase to 120F /130F if the current setting at 110F, be
:sure to double check the user manual. If the issue still exists, you need
to pull out of a sensor wire from a panel and keep others on, and nail down
这个地方不太明白。你是说pull out discharge air sensor的wire吗?"keep
others on"是指的哪些?
:which zone has the problem.
:When you change the temperature of the sensor, the stage of blower has
:change accordingly. It may be a little complicated if you are not a
:prefeesional, it could have sensor issue, or a damper becomes bad.
damper bad是说damper该关上的时候没关上吗?我家的damper默认是开着的,如果一个
zone的heat开始工作时,就会把其他zone的damper关上。
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p*0
10
欺骗的,要贡献一个跳蛙出来做头奖!哈哈
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s*g
11
Bless!
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d*j
12
When the temperature reaches 110F (the set temperature at the switch), the
switch will open and the furnace will shut down. If the problem still
persists after the temperature set at 120F to 130F, you should find the
original installer to check the reason, it could be the wrong set at the
dampers and something related to the blower speed, the blower should blow
air volume enough to remove the heat generated by the heat exchange. You can
't handle it after you do a necessary diy check as below:
1) Check the air filter at the return grille and at the return duct.
2) Find the user manual, the temperature limit of the high limit switch, it
should be not over 140F if your furnace is 90% AFUE or above.
3) You should find a professional if the issue is still here. (After you
adjust the temperature to 120 to 130F at the zone panel board).
Understand the DAS can improve the temperature control, but never fix the
existing issue of the ductwork.
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h*n
13
欺骗大众的,要重罚!
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x*u
14
Bless!
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z*e
15
多谢回复。
在控制面板上,有个switch上面写着140F DAS, 我的理解是DAS 设定在140F. 我试着把
DAS从duct里拿出来,还是同样的问题,furnance一会运行,一会停,停的时候,我测
了一下DAS的电阻,是无限大,在furnance运行的时候, DAS的电阻不是无限大。看起
来是DAS出了问题,你觉得呢? 有没有可能是其他的问题?

:When the temperature reaches 110F (the set temperature at the switch), the
:switch will open and the furnace will shut down. If the problem still
:persists after the temperature set at 120F to 130F, you should find the
:original installer to check the reason, it could be the wrong set at the
:dampers and something related to the blower speed, the blower should blow
:air volume enough to remove the heat generated by the heat exchange. You
can't handle it after you do a necessary diy check as below:
:1) Check the air filter at the return grille and at the return duct.
:2) Find the user manual, the temperature limit of the high limit switch,
it should be not over 140F if your furnace is 90% AFUE or above.
:3) You should find a professional if the issue is still here. (After you
:adjust the temperature to 120 to 130F at the zone panel board).
......
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a*4
16
Bless
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d*j
17
若电阻是"ol", 说明断了,不应该是这样,你要确保测的range是k-ohms。 若还是这个
问题,买个新的试试,这是最小的成本。检查更换新的air filter。
switch上面应该有个旋钮,或者是jumper,调整das的最高温度,140F应该是最高的温度
,不应该达到这个问题,应为das的位置在supply duct,而furnace limit switch 在
heat exchange附近,这个温度最高在140F,所以das的温度最高在130F左右,仔细看看
现在的设定在110F还是130F。
核实das后,才能做下面的工作,而这些涉及更多的东西,恐怕一时半会楼主不太清楚
,因为这涉及EMC MORTOR,two stage burner和这个smart zone panel,一般的技工可
能搞不定,若你还是不能搞定,需要找对的技工,最好是装这个系统的人。
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x*i
18
thank you guys.
Keep calm and fingers crossed.
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i*e
19
友情提醒一下两位
DAS 只是一个附属功能装置, 是可装可不装的。
在没有新的DAS在身边的话,要先确认是DAS这端 出问题还是furnace 端出故障,不要
认为拆了DAS 就可试了,看说明书。
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r*c
20
big bless!
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z*e
21
多谢各位的回复。
imore,怎么样能够确定是不是 DAS的问题呢?如果是DAS 的问题,我还可以换,不是的
话,就要找人来看了。
前几天找了一个人看,没查出问题,他好像说我的机器是什么marginal的机器,比较麻
烦,他当时没看到控制板上面的code,他走以后,我自己看到控制板上面的code,发现
是code和DAS有关。

:友情提醒一下两位
:DAS 只是一个附属功能装置, 是可装可不装的。
:在没有新的DAS在身边的话,要先确认是DAS这端 出问题还是furnace 端出故障,不要
:认为拆了DAS 就可试了,看说明书。
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l*u
22
祝福
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d*j
23
其实还有一个办法,就是turn off zone board, 保证所有damper打开,测试furnace的
high limit switch是否有相同问题。
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y*o
24
bless!!

【在 x***i 的大作中提到】
: thank you guys.
: Keep calm and fingers crossed.

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i*e
25
见到这个帖子进行到了找技工, 换句话说已经走到了尽头, 网上排查这种结果很正常
的。但是我觉得有些信息提出来或许会让您们继续走下去。我对弟弟姐姐已经明确的说
过不再解版上的空调帖子, 但是我是非常支持他的。如果他认为我的提示对这个帖子
有帮助, 他会重新思考,带您继续走下去的, 给他点时间:)

不要

【在 z*****e 的大作中提到】
: 多谢各位的回复。
: imore,怎么样能够确定是不是 DAS的问题呢?如果是DAS 的问题,我还可以换,不是的
: 话,就要找人来看了。
: 前几天找了一个人看,没查出问题,他好像说我的机器是什么marginal的机器,比较麻
: 烦,他当时没看到控制板上面的code,他走以后,我自己看到控制板上面的code,发现
: 是code和DAS有关。
:
: :友情提醒一下两位
: :DAS 只是一个附属功能装置, 是可装可不装的。
: :在没有新的DAS在身边的话,要先确认是DAS这端 出问题还是furnace 端出故障,不要

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L*o
26
祝福你!
我下周一交,收到receipt再pp。祝福我们!
[在 xudli (nana) 的大作中提到:]
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z*e
27
多谢各位的帮助!!

:见到这个帖子进行到了找技工, 换句话说已经走到了尽头, 网上排查这种结果很正
常的。但是我觉得有些信息提出来或许会让您们继续走下去。我对弟弟姐姐已经明确的
说过不再解版上的空调帖子, 但是我是非常支持他的。如果他认为我的提示对这个帖子
:有帮助, 他会重新思考,带您继续走下去的, 给他点时间:)
:【 在 zhimage (common) 的大作中提到: 】
:: 多谢各位的回复。
:: imore,怎么样能够确定是不是 DAS的问题呢?如果是DAS 的问题,我还可以换,不
是的
:: 话,就要找人来看了。
:: 前几天找了一个人看,没查出问题,他好像说我的机器是什么marginal的机器,比
较麻
:: 烦,他当时没看到控制板上面的code,他走以后,我自己看到控制板上面的code,
发现
......
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s3
28
bless

【在 x***i 的大作中提到】
: thank you guys.
: Keep calm and fingers crossed.

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d*j
29
How does the system work now? If you get a new sensor, you may do some tests
as below:
The first step: Replace a new sensor, make sure all dampers open at all
zones but must close the bypass damper, sit at the furnace and run the
system. If the system still has the same problem, go to the next step.
The Second step: disconnect the R terminal, the W terminal, the G terminal
from the furnace board to the zone panel, power off the zone panel. Use a
jumper wire between the R terminal and the W terminal at the furnace board,
power on the furnace. If the same issue will happen, you should check the
limit switch of the furnace, also check the error code. The most important
thing must be figured out what could cause the limit switch opened, you
should go to hire an experienced HVAC tech to do it. Or you can review
another post regarding THE LIMIT SWITCH TEST today.
Hopefully, you can solve the problem at the first step.
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d*j
30
The third step: run the system again, but remove the jumper from the R
terminal and the W terminal at the furnace board, the furnace should run
well if no any issue.
The fourth step: connect the wires of R, W, and G to the furnace board, but
still open all dampers and close the bypass damper, power on the zone panel,
run the system, go to the next step if having the same problem.
The fifth step: repeat the fourth step, but test each zone can work
individually, the bypass damper may cause a problem if the sensor is still
open, the bypass damper should be tested or adjusted as need.
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z*e
31

:The third step: run the system again, but remove the jumper from the R
:terminal and the W terminal at the furnace board, the furnace should run
:well if no any issue.
:The fourth step: connect the wires of R, W, and G to the furnace board,
but still open all dampers and close the bypass damper, power on the zone
panel, run the system, go to the next step if having the same problem.
:The fifth step: repeat the fourth step, but test each zone can work
:individually, the bypass damper may cause a problem if the sensor is still
:open, the bypass damper should be tested or adjusted as need.
换了sensor后现在工作正常了,应该就是sensor的问题。再次感谢。
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