TM005 Rheem Solar Hiline Service Instructions REV D
D.O.I 20/02/2009
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20
TEST 6a & 8a
– EWT Type Thermostat
TEST 6b & 8b
– ST Type Thermostat
Test 6:
Using a multimeter on the x1 resistance
scale, measure between terminals 1L and 2T on the
thermostat.
The reading should be 0 ohms.
Test 8:
Same test points as test 6a however the
reading should be infinity (open circuit).
Test 6:
Using a multimeter on the x1 resistance
scale, measure between terminals 1 and 2 on the
thermostat.
The reading should be 0 ohms.
Test 8:
Same test points as test 6b however the
reading should be infinity (open circuit).
TEST 7a
– EWT Type Thermostat
TEST 7b
– ST Type Thermostat
Remove element wires from terminals 2T & 4L of
the thermostat. Using a multimeter on the x1
resistance scale, measure between the element
terminals.
Normal resistance for the heating unit is:
2.4kW: 22 ohms
– 24 ohms +/- 10%
3.6kW: 15 ohms
– 16 ohms +/- 10%
4.8kW: 11 ohms
– 12 ohms +/- 10%.
Remove element wires from terminals 2 & 4 of the
thermostat. Using a multimeter on the x1 resistance
scale, measure between the element terminals.
Normal resistance for the heating unit is:
2.4kW: 22 ohms
– 24 ohms +/- 10%
3.6kW: 15 ohms
– 16 ohms +/- 10%
4.8kW: 11 ohms
– 12 ohms +/- 10%
