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 The sample repairs worksheet at the end of Chanter 5, Repairs, includes a section
to describe what troubleshooting was done on a particular system. We suggest you
use it, or one like it.
4.2 TROUBLESHOOTING CHART
How to Use This Chart;
The troubleshooting chart is arranged in sections which correspond to typical
problems encountered with solar heating systems. Any of these problems may be
found through a scheduled inspection, or by the system users.
Each problem section includes symptoms, followed by possible causes for each
symptom. Causes are arranged with the most likely ones listed first.
Again, check the "low impact" source of a problem first, and remember more than
one problem source may exist to find and fix. Careful testing and inspecting may
avoid another trip back to "rerepair" the system.
The next section contains information on specific troubleshooting operations, and
tips on common causes.
Information on recommended repair actions can be found in Chapter 5 in the repair
and replacement section devoted to each component. (For example, sensor and
control repair and replacement procedures are in Section 5.1.7.)
ACTION
PROBLEM
SYMPTOM
CAUSE
Check for and repair leaks.
Tank temperature
Collector loop shows
Collector loop airbound
lower than normal
Check pressure relief valve(s).
loss of pressure
Check for proper use. location,
and operation of air vents.
Recharge system with solar flub.
Repair or replace absorber.
Leak in absorber plate
Check that collectors are:
Collector loop shows
Collectors not receiving
energy or system under-
1) facing true south
no loss of pressure
2) tilted properly
sized
3) unshaded
4) sized for bad, (see App. A+B)
5) free of dust, etc.
Check air vents for trapped air.
Collector loop airbound
Replace expansion tank
or leak in expansion tank
Recharge system with solar fluid.
diaphragm
TROUBLESHOOTING
108
4.2 TROUBLESHOOTING CHART
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