Rheem 55027500 Service Instructions Manual page 36

Component Tests 17 -18
Ensure power is isolated before conducting this test
Ensure power is isolated before conducting this test
Ensure power is isolated before conducting this test
TM017 Rheem Air Sourced Heat Pump Service Instructions REV: C
Date of Issue: 5/11/05
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Test 17
Using a multimeter on the x1 resistance
scale, measure between terminals 2T
and 4L of the thermostat. Normal
resistance for the heating unit is:
2.4kW: 20 - 25 ohms
3.6kW: 13 -17 ohms
Test 17A
Using a multimeter on the x1 resistance
scale, measure between terminals 1L
and 2T of the thermostat.
Normal resistance for the heating unit is:
2.4kW: 20 - 25 ohms
3.6kW: 13 -17 ohms
Test 18
Using a multimeter on the x1 resistance
scale, measure between active and
neutral on the terminal block.
Normal resistance when the heat pump
is in boost mode with the thermostat
contacts are closed is:
2.4kW: 20 - 25 ohms
3.6kW: 13 -17 ohms
35
Service. All printed copies not bearing this statement in RED are deemed "uncontrolled".
550275 models
551275/A models