Navien CH-180, Service Manual, Page: 37 / 155

35
4.6.3. Transformer
Navien Part No.
Function
Check Point BH1205008A H, K, S
Failure Event
1. There is no power coming from the transformer.
2. The voltage from the power supply cannot be converted to 120 VAC.
Effects
Error Code
N/A
Diagnostic
Color /
Number of wires
1. [AC 9 V] Yellow – Yellow : AC 7 ~ 11 V
2. [AC 26 V] White – White : AC 22~33 V
3. [AC 19 V] Blue – Blue : AC 16~24 V
4. [Power trans AC 150 V] Red – Red : AC 123~177 V
5. [Power trans AC 120 V] White – Black : AC 97~138 V
1. To supply power to the main PCB board.
2. Every electrical component of the unit is designed to only work with a
120VAC power supply; therefore, the unit comes equipped with this
transformer.
1. The unit does not operate due to lack of power from transformer.
2. A failed transformer can cause electrical damage to other electrical
components within the unit.
1. Visual inspection: Connection and/or breakage of wires and/or signs of
electrical damage.
2. Voltage check: Check range of voltage shown below.
ڜڞڍڑڱ
ڌ ڍ
ڎ ڏ
ڜڞڌڐڋڱ
ڜڞڔڱ
ڜڞڌڍڋڱ
ڌ ڍ ڎ ڏ
ڌ ڍ
ڎ ڏ
ڌ ڍ
ڎ ڏ
© Navien Ameri c a I n c . 20 1 0 CH series servi c e Manua l Version 1 .0