Rheem II Series Service Instructions Manual page 33

Tests 1 -3
Components will be "Live" when conducting tests, exercise caution.
Test 1 – Mains power
Measure the voltage at the connector plug
(Position 'A' on the PCB) with a multimeter set on
the AC voltage scale. If the voltage is between
230V and 250V the cord set and fuses are ok.
Conduct test with water flowing Measure the voltage between 16 Black and 18 Red connector
'F'. Voltage should be between DC7 – 15V for correct flow sensor operation
DC2 –5V (or measurement by pulse counter of not less than 1310 pulses per minute) between
17 Blue and 16 Black
TM090 12-26 Series II CFGWH Service Instructions
REV AB – Issued February 2019
This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed "uncontrolled"
Unplug connector 'I' from the PCB and
measure the resistance of the Over Heat
Limiter Assembly. Resistance should be
between 40 kilo-ohms and 500 kilo-ohms
between 2 White and 3 White.
Test 3 – Flow sensor
Test 2 – Over heat limiter
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